USGS Water Resources✓

Wildfires don’t just threaten our landscapes - they also threaten our water. 💧🔥 New research spanning five U.S. wildfire case studies shows how rapid, collaborative science can help water agencies and managers move from reactive crisis response to proactive resilience. What we learned: 💧 Rapid research + coordinated response = better decisions during water emergencies 💧 Pre-wildfire planning matters, from watershed health assessments to hands-on workshops 💧 Collaboration between scientists, water agencies, and managers strengthens recovery 💧 Co-produced knowledge helps communities protect drinking water, ecosystems, and infrastructure 💧 A proactive R2O2R (research-to-operations-to-research) framework can guide water management before, during, and after wildfire Dive into the full paper to explore how smarter, faster wildfire-water research can transform resilience nationwide - 📷1: Photo of Sonoma County Water Agency engineer surveying burn damage at the Walbridge Fire burn scar in the Russian River watershed, California (November 2020). The Russian River watershed experienced multiple wildfires between 2017 and 2020. Credit: Stephen Maples, Sonoma County Water Agency 📷2: Photo of Lawrence Berkeley National Laboratory scientist and Sonoma Water Agency engineering technician collecting water samples at Franz Creek in the Russian River watershed, California (November 2017) for analysis at USGS laboratories in Boulder, Colorado. Credit: Todd Schram, Sonoma County Water Agency.

A question we hear a lot is, what is a HUC and how do I find my location? A watershed is an area of land where all precipitation and runoff drain to the same stream, river, lake, or ocean. 💧Watersheds are separated by high points in the landscape, such as hills or mountain ridges, called drainage divides (see image 3 from Alaska). In a flatter landscape, these divides can be very subtle, where there is just a small change in slope (see image 4 from Texas). 💧 Instead of street names and ZIP Codes, scientists use Hydrologic Unit Codes (HUCs) to identify watersheds across the United States.  💧 The USGS and other federal agencies developed the HUC system to organize watersheds into a nested hierarchy. Each additional set of digits in a HUC code identifies a smaller and more detailed watershed.  📍 In this way, HUC 03 represents the South Atlantic-Gulf and HUC 0309 represents just a portion of southern Florida. 📍 HUCs go all the way down to 12 digits, which range in size from approximately 10,000 to 40,000 acres – that’s less than 10% of Rhode Island’s size. Visit our page, “What is a HUC?” to learn more – 💡 Hey teachers! We recently created a new lesson plan on Water Science School to help students learn how watersheds are mapped, discover their own HUC, compare local and regional drainage patterns, and learn how water connects communities across the country. Check out the lesson plan! Link on the "What is a HUC?" page! 📷 1: Loch Vale Watershed in the Rocky Mountain National Park, Colorado. Credit: USGS 📷 2: Image illustrates the nesting of hydrologic unit codes (HUCs), which result in successively smaller drainage units and add digits to the HUC to create a unique “address.” Illustration by Althea Archer, USGS 📷 3: The Agashashok River watershed in Alaska. Credit: Michael P. Carey, USGS 📷 4: The Pecos River Watershed in Texas. Credit: Natalie Houston, USGS.

💧Science meets history at the falls! 🏛️🔬 The Paterson Great Falls National Historical Park (PAGR), located on the Passaic River just 15 miles west of New York City in Paterson, New Jersey, was established as a unit of the National Park System in 2011. 🏭 Alexander Hamilton visited the falls in 1778, finding them to be useful for industrial purposes. In 1791, as Secretary of the Treasury, he declared this site to be the location of the Nation’s first planned industrial city, or a “national manufactury.” 🏞️ The park showcases the natural beauty of the cascading Paterson Falls on the Passaic River alongside the historic and cultural resources of Paterson, New Jersey. But centuries of industrial use have taken a toll. ⚠️ The Passaic River segment that flows through the park, and the sub-watershed surrounding the park, supports its designated uses for agricultural and industrial water supply but does not support its designated uses for aquatic life, fish consumption, swimming, or public water supply. As part of the NPS-USGS Water Quality Partnership Program, the USGS New Jersey Water Science Center partnered with the National Park Service, the U.S. Environmental Protection Agency, and the Urban Waters Federal Partnership to establish a baseline water quality inventory to compile and evaluate historic water quality in the park. 🧪📊 This critical inventory is important for building an understanding of what is needed to sustain healthy aquatic ecosystems, support the recreational purposes of the park, and attain all designated beneficial uses. Learn more: 📷 1-4: Scenic views of Paterson Great Falls in Paterson Great Falls National Park, New Jersey. Credit: Sally Carullo, USGS

Public supply is the third largest way in which Americans use water – and about 83% of people living in the United States get their water through public supply systems. Public water-supply systems are government or privately run facilities that withdraw water from rivers, lakes, reservoirs, and wells and then deliver it to homes, businesses, and schools. 💧 35,823 million gallons per day (mgd) of water was withdrawn for public supply across the lower 48 states. 💧 Withdrawals from surface water totaled 18,586 mgd (about 52%) and from groundwater 17,236 mgd (about 48%). 💧 The Northeast hydrologic region withdrew the most at about 20% (7,142 mgd), followed by California-Nevada at about 15% (5,390 mgd). The Northern High Plains region used the least, with about 0.4% (139 mgd). 💧 Nationally, public supply withdrawals are highest in July at 43,697 mgd, followed by August at 42,975 mgd. December has the lowest at 29,971 mgd. Industry and people located in more densely populated areas depend upon public-supply systems, emphasizing the need for quality data collection for public water-supply systems in the United States. Learn more about public supply water use - 📷 1: Map of 2020 public supply water use by watershed (HUC12) across the lower 48 United States and timeseries showing public supply water use withdrawals from 1985 to 2020. Credit: Elmera Azadpour, USGS 📷 2: The historic water tower in Chicago, IL, built in 1869 and now a museum. Credit: Nancy Barber, USGS 📷 3: USGS Water towers at Upper Midwest Environmental Sciences Center. Credit: USGS

Behind every storm track is a network monitoring water movement in real time. 📡🌊 Hurricane Isaias made landfall near Destin, Florida on October 9, as a Category 2 storm. Tracking inland through Alabama, its remnants brought damaging winds, significant rainfall, flash flooding, and life-threatening storm surge from the Gulf Coast to the southern Appalachians and Mid-Atlantic. 💧 4 to 6 inches of rain, with localized flash flooding fell across the Gulf Coast. 💧 Over 12 inches of rain was reported for Bellwood, Alabama and DeFuniak Springs, Florida. 💧 2-5 inches of rain with nearly 10 inches in localized areas were observed across the Southeastern U.S. While weather models forecast where the rain will fall, USGS streamgages and hydrologic technicians measure the ground-level impact, giving emergency managers the data they need to make critical safety decisions. Explore the latest Hurricane Isaias information - 🎥: Animated map tracking Hurricane Isaias across the Gulf Coast and Southeast U.S. from October 7, 7:00 PM CDT through October 12, 6:00 PM CDT (landfall October 9, 8:30 PM CDT), with hourly rainfall totals, streamgages colored by flood severity, a running count of gages in flood stage, and a stacked bar chart of flood-stage gage counts building over time. Credit: Elmera Azadpour, USGS

Water connects us all - especially in our wildest spaces! 💧 🌿 🦆 🦅 This week is National Wildlife Refuge Week. Managed by the U.S. Fish and Wildlife Service (FWS), the National Wildlife Refuge System is a network of more than 570 national wildlife refuges encompassing more than 800 million acres of public lands and water. From monitoring streamflow, tracking water quality, and mapping wetlands to studying how changing climates affect habitats, USGS science provides valuable data that FWS uses to conserve and manage these vital sanctuaries. What’s your favorite National Wildlife Refuge? Tell us in the comments. 👇 📸 1: A USGS Hydrologist filters wetland water to sample for infectious avian influenza in Izembek National Wildlife Refuge, Alaska. Credit: USGS 📸 2: A USGS Hydrologist uses a small unoccupied aircraft system, sUAS or "drone," to collect information about vegetation on Malheur National Wildlife Refuge in Oregon in August 2018. Credit: Cian Dawson, USGS 📸 3: A field assistant wades in a wetland while filtering for infectious avian influenza virus at the Roseau River Wildlife Management Area, Roseau, Minnesota. Credit: USGS 📸 4: A sensor is deployed to measure flow in a channel of the marsh in Rachel Carlson National Wildlife Refuge. Credit: Sandy Brosnahan, USGS #NationalWildlifeRefugeWeek #WaterScience #FieldPhotoFriday

The vital flow: Understanding water’s essential role in thermoelectric power generation. ⚡️💧 When you get home in the evening after a long day of work and flip on the lights, you might not think about the intricate systems behind the electricity that powers your home. But the reality is that it takes a lot of science—and water—to deliver the electricity you expect and rely on in your house. Thermoelectric power plants, which rely heavily on water for their operations, are among the most critical producers of energy in the U.S. Thermoelectric plants use water in two ways: ⚡️ By heating water into steam to generate electricity ⚡️ By using cooling water to condense the steam back into liquid water for reuse or release Understanding how much water is used, where, and when is vital to meeting the Nation’s water demand. 💧 In the 2020 water year (October 1, 2019 through September 30, 2020), thermoelectric power generation, public supply, and crop irrigation accounted for about 90% (approximately 224,000 million gallons of water per day) of the freshwater withdrawn daily in the lower 48 states. 💧 Thermoelectric power made up 36% of that volume at about 82,000 million gallons of water a day. 💧 While most of the water used in thermoelectric plants in the U.S. is freshwater, some thermoelectric power plants also use saline water, which reduces the demand for freshwater. 💧 Nearly all (96%) of the freshwater used in thermoelectric power generation is eventually returned, although the rate varies based on the type of cooling system employed by a given plant. Learn more about how water is used in thermoelectric power generation - 📷 1: Map of 2020 thermoelectric power water use by watershed (HUC12) across the lower 48 United States and timeseries showing thermoelectric water use withdrawals from 1985 to 2020. Credit: Elmera Azadpour, USGS. 📷 2-3: Power-generating plants use evaporation to cool hot water. Credit: Alan Cressler, USGS. #WaterUse #Thermoelectric #WaterData

Geoscience is for everyone because WATER is for everyone! 💧 🌍 It’s Earth Science Week and today is Geoscience is for Everyone Day! To celebrate, dive into the complex and interconnected world of our planet's most vital resource. From industrial and agricultural use to urban runoff and reservoirs, the water cycle describes how water moves from Earth’s surface into the atmosphere, then back to the surface again or to below Earth’s surface. Geoscience isn't just about rocks - it’s about understanding the environment we live in and impact every day. Learn more about the key processes of the water cycle and how natural and human interactions influence where water moves, how it's stored, and how clean it is. 🔎 Explore the Where’s the Water series of posters to learn more about water cycle processes - 📷: Illustrated water cycle diagram components from the Where’s the Water series of posters designed for educators. These posters provide insight into the water cycle in 6 different systems: coast, urban, agriculture, suburban, forest, and desert. #EarthScienceWeek #ESW2026 #STEM

Hurricane Isaias made landfall on late Friday evening as a Category 2 hurricane, then weakened and headed north-northeast through Appalachia as a post-tropical cyclone. Isaias brought damaging winds, heavy rain, flash flooding, power outages, and life-threatening storm surge to the northern Gulf Coast and up along the eastern seaboard. 💧 The Gulf Coast saw 4 to 6 inches of rain through the weekend, with localized flash flooding. The National Weather Service reported over 12 inches for Bellwood, Alabama and DeFuniak Springs, Florida. 💧 The rest of Southeast, including the Southern Appalachians and coastal Carolinas, saw 2 to 5 inches of rain, with localized higher amounts of nearly 10 inches. USGS hydrologic technicians responded along the entire path of the storm, from Florida up through North Carolina to determine impacts and provide data for local and state agencies. USGS data informs: 🌊 Local water conditions at streamgages across the country, including comparisons to historical conditions and flood status 🚧 Flood impacts to local infrastructure from bridges to pedestrian walkways, and more 🚨 Landslide risks and impacts View Real-Time Flood Impacts across the Southeast over the past weekend - 💡 Did you know: Each point of interest on the map can be selected to learn more about the impacts, link out to the USGS monitoring location page, or create a WaterAlert for that site. 📷 1: USGS hydrologic technicians collect field measurements on Shoal River near Mossy Head, Florida (ID 0268500) during peak flooding conditions. 📷 2: Hydrographs showing continuously measured gage height before, during, and after Hurricane Isaias at streamgages in Alabama, Georgia, North Carolina, and Florida. Field measurements are shown as yellow dots on the hydrograph. The gage on Shoal River (ID 02368500) hit a peak of record for that site. Credit: Althea Archer, USGS 📷 3: The Real-Time Flood Impact mapper showing many flooded areas of interest throughout the Southeast from October 9 through October 13, 2026. Credit: USGS

Tropical Storm Rachel’s impact can be felt across large areas of the southwestern U.S. 💧 In California, precipitation totals in San Diego, Imperial, and Riverside Counties ranged anywhere from 0.75 inches at the coast to a bit over 2 inches in most of the mountainous regions. 💧 In Nevada, 9 streamgages on the main stem of the Las Vegas Wash are recording significant peaks of approximately 8,000 to 10,000 cubic feet per second, marking the largest event in the area since 2023. 💧 In Utah, a streamgage on Big Brush Creek near Vernal (ID 09261700) measured a peak of record for gage height, with several other gages in top 5% peak levels. 💧 In Arizona, a gage on Fossil Creek (ID 09507480) was near an annual peak flow and represents the highest measurement recorded there in years. USGS has field crews out today making critical field measurements at gages to verify data and document other impacts, such as high-water marks. See the current status of gages and weather conditions with the National Water Dashboard – 📷 1: Two USGS hydrologic technicians making high flow wading measurements on Muddy River, Glendale, NV (ID 09419000) on October 13, 2026. Credit: Hampton Childres, USGS 📷 2: View of conditions at Fossil Creek near Strawberry, AZ on October 11, 2026. Credit: Kurt Schonauer, USGS. 📷 3 USGS hydrologic technician servicing the crest-stage gage at the Las Vegas Wash Overflow at Lake Las Vegas Inlet (ID 09419756). This area is normally dry and is the inflow to Lake Las Vegas. It only flows during large runoff events. During normal flows, the Las Vegas Wash bypasses Lake Las Vegas through a series of culverts. Credit: Hampton Childres, USGS. 📷 4: Conditions after the storm on Whitewater River near Indio, CA (ID 10259300). Credit: USGS

Point of clarification: The peak discharge associated with Big Brush Creek near Vernal (ID 09261700) is about 73 cfs. The maximum discharge recorded at this site was actually 423 cfs in May 2005. In this case gage height is a bit misleading when referencing peaks, because datums can vary. (Datums refer to the baseline from which gage height is measured).  However, this doesn't diminish the impact in Utah! As of 09:45 MDT on October 13, 2026, 12 streamgages in Utah were reporting all-time high flows for this day of the year.

September streamflow conditions across the U.S. 💧 In September, wet conditions persisted across much of the Midwest and eastern U.S., while dry conditions continued across parts of the West and Southeast. Notable weather patterns included: 🌧 Repeated rounds of heavy rain in mid-September brought flooding to parts of the Midwest and Ohio River Valley, including Indiana, Ohio, and West Virginia. 🌊 A late-September nor'easter brought heavy rain and coastal flooding to the Mid-Atlantic, including New Jersey and Delaware. 💧 The remnants of Hurricane Polo caused localized flooding in parts of Texas and New Mexico. ☔️ Hawaii was in the path of two hurricanes, Hurricane Lowell in early September and Hurricane Nolo in late September. ☀️ Drought conditions persisted across the Southeast, including Georgia and the Carolinas, as well as the Southwest including Colorado and New Mexico. Explore more water data visualizations: 📷: September 2026 streamflow conditions. Tile chart showing national streamflow conditions and streamflow conditions in the U.S. with a tile chart for each state by flow percentiles at USGS streamgages relative to the historic record across the U.S. Flow percentiles are broken up into seven bins from 0–100% where increased percentiles indicate wetter conditions. #WaterData #rstats #dataRetrieval

A picture is worth a thousand data points! 📷 📈 We’re harnessing camera-based monitoring and the USGS Flow Photo Explorer (FPE) to track baseflow resilience in tributaries across the Neversink Reservoir Watershed, New York. As part of the USGS Next Generation Water Observing System, this project uses cost-effective technology to assess hydrologic conditions and improve understanding of how flow is maintained in the watershed during periods of low recharge. Headwater streams, where baseflow contributes most prominently to streamflow generation, are often located in rugged, steep terrain that is difficult to access and monitor. What is baseflow resilience? 🏦 Think of it as a stream’s natural savings account - the water that seeps into streams from groundwater. How does the technology work? 📸 Camera network - Fifteen stream and spring sites across the watershed are equipped with trail cameras programmed to capture images at 1-hour or 15-minute intervals. 💻 Machine learning analysis - Trail camera imagery from small streams and hillslope springs was analyzed using FPE to develop site-specific machine-learning models capable of identifying high-flow, low-flow, and dry conditions in minimally monitored areas. 📈 Data visualizations - Interactive visualizations animate flow changes over time and compare conditions. Every image tells a story of water’s journey. This innovative approach delivers hydrological insights that help protect ecosystems, manage resources, and prepare for the future. 🔎 Explore the FPE - 📸 1-3: USGS trail cameras monitor mountain headwater streams and groundwater springs in remote locations in the Neversink Reservoir Watershed, New York. 📸 4: Graph displaying flow rank percentiles over time from the FPE model, with orange circles marking trail camera image captures. The model tracks hydrological changes, capturing both a winter 2023-2024 snowmelt high-flow event and dry periods when the spring stopped flowing. Bottom images show the spring in flowing (left) and dry (right) conditions. 📸 Credit: Diana Phillips, USGS #FieldPhotoFriday #WaterData #NewYork

Attention teachers, students, and anyone who likes to hedge your bets! Introducing Flood Risk Simulator: The Game. Flooding is one of the most common and costly natural hazards worldwide. Communities near rivers face tough decisions: Should they invest in insurance? Build in safer zones? Or take the risk to save money? This educational activity puts you in the role of a community planner in a floodplain. You'll manage a budget, make choices about insurance, and experience the consequences of floods over time. By modeling real-world trade-offs, you'll explore how probability, risk, and human decision-making shape the resilience of communities. 💧 You will work in teams to manage a playground located in the floodplain. 💧 Your goal is to keep your playground open for play while keeping your budget low. 💧 Because each playground sits in a different part of the floodplain, some teams will face a higher or lower chance of flooding than others. 💧 The closer your playground is to the river, the cheaper the land is, and the more expensive the insurance premium is. Play the game now to learn more about flood frequency, cost trade-offs, and risk! 🔗 📷: Cartoon image of a flooding playground with cartoon money floating in the water. Illustration by Althea Archer and Mandie Carr, USGS. #STEM #Floods #Gaming

💧 New Lake Temperature Data Now Available! USGS scientists have released one of the largest lake ‑temperature datasets ever created, covering 130,000+ lakes across the U.S. from 2013–2025. Thanks to the Landsat 8 satellite and cloud computing, this resource even includes small lakes down to 4 hectares (about four football fields), helping us better understand how small waterbodies can shape big ecosystem processes like carbon and nutrient cycling. Explore the dataset on WaterMAP and check out its recent feature in DOI’s Remote Sensing Activities. 📷1: Collecting field samples to validate satellite remote sensing of water quality on Fernan Lake, Idaho. 📷2-3: Maps of waterbody temperature for 139,954 lakes during 2013-2025 by season. Credit: USGS Learn more: #RemoteSensing #LakeTemperature #WaterData

🍎💧 Happy World Teachers’ Day! The USGS Water Science School appreciates the teachers who inspire curiosity, encourage questions, and help students better understand the world around them. We’re here to help bring water science into the classroom with free, ready-to-use resources, including lesson plans, activities, water cycle resources, real-world water data, and more! 🌎📚 Thank you, teachers, for helping the next generation explore, question, and discover. ❤️ 👉 Explore USGS Water Science School’s educator resources and find something new for your classroom! 🔗 📷1: Photos of teachers during a USGS workshop in July 2024. 📷2: Collection of resources and events from the USGS Water Science School. 📷3: Photo of a group of teachers attending a USGS workshop in July 2024. Credit: USGS #WorldTeachersDay #Teachers #WaterScience

Neither snow nor rain nor heat nor gloom of night stays these hydrotechs from the swift completion of their appointed rounds. 🌧️❄️☀️ While this creed usually belongs to mail couriers, it perfectly describes dedicated USGS hydrologic technicians who brave the elements to keep data flowing. Every day, no matter the weather, USGS hydrotechs are out in the field wading through rivers, braving storms, and trekking to remote stations to collect essential data that keeps communities safe. From tracking floodwaters during severe storms to monitoring water quality and assessing long-term trends, their measurements help forecasters, resource managers, and the public make informed decisions when it counts the most. Explore USGS water data – 📷 1: A USGS Hydrologic Technician takes a discharge measurement of the ice-covered Chippewa River at streamgage 05305000 near Watson, Minnesota. Credit: USGS 📷 2: A USGS hydrologic technician performs a wire weight measurement in record flood at gage 7018500 Big River at Byrnesville, Missouri. Credit: Joshua Keele, USGS 📷 3: A USGS hydrologic technician measures streamflow in Lightning Creek at Clark Fork, ID. Credit: Ryan Smith, USGS 📷 4: USGS scientists conduct surface water sampling during an evening monsoon storm in July 2024 at Adobe Acres Inflow at Albuquerque, New Mexico. Credit: USGS #FieldPhotoFriday #WaterData #Monitoring

Bring on the changing colors, crisp weather, flannels, and pumpkin spice, it’s fall! 🍁🍂 What’s your favorite fall activity? Ours is monitoring surface and groundwater around the country. Hydrologic technicians immerse themselves in the fall colors and cooling temperatures throughout the season: 🍁 Collecting water samples for water quality analysis 🍁 Measuring streamflow at gages and with portable Acoustic Doppler Current Profilers 🍁 Calculating groundwater depth across America’s aquifers 🍁 Verifying quality assurance by comparing automated sensors against manual measurements All these monitoring data and more are available through our Water Data for the Nation (WDFN) delivery systems, such as: 🍂 Explore USGS Water Data, an interactive map providing current and historic data from gages and field samples across the country 🍂 My Favorites, where you can select monitoring locations of special interest to you and check back in on them at any time. 🍂 WaterAlert, where you can set specific water levels that might indicate flooding or drought and get alerted via text or email when conditions change. 🍂 Monitoring Location Pages, which are the heart of these other services. On a monitoring location page, you can view near real-time water data in graphs and tables, download data directly, and even view cameras placed at the location when available. Check out the WDFN home page to start exploring USGS water data today! 🔗 📷: USGS Hydrologic Technician takes a water quality sample from the Saugatuck River near Redding, Connecticut. Credit: Paul Solis, USGS #WaterData #WaterQuality #WaterDataForTheNation

What happens when a fieldwork challenge leads to a new way of communicating? For USGS Hydrologic Technician Sabrina Mederich, it meant creating a standardized system of visual signs and gestures for streamgaging terminology and introducing large-format communication tools that support coordination in challenging environments. Effective teamwork relies on clear communication. As a Deaf worker, Sabrina noticed communication barriers during field operations, which inspired her to develop this new visual system. This tool is widely used by the USGS Nevada Water Science Center (NV WSC), significantly enhancing operational clarity, safety, and collaboration across the team. Sabrina’s strengths in data collection and processing, team coordination, and mentoring new staff are an asset that strengthens the NV WSC. In recognition of her innovation and impact, Sabrina was named the USGS 2026 Early Career Data Person of the Year. 📷 1: Sabrina makes a discharge measurement. Credit: USGS 📷 2: Sabrina assists with an indirect survey, measuring a culvert after a flood event. Credit: Chris Morris, USGS

Hawaii is in the path of a major storm once again, while damage from previous storms is still impacting communities around the islands. Hurricane Nolo is forecast to strengthen as it approaches the Hawaiian Islands this weekend, bringing a significant risk of damaging winds and flooding. With assistance from staff deployed from multiple mainland Water Science Centers (WSC), USGS Pacific Island WSC is prioritizing restoration of critical real-time monitoring on the Big Island of Hawaiʻi while repositioning staff to ensure their safety. 💧 Staff restored real-time operations at USGS station Paauau Gulch at Pahala (16770500) yesterday. This is the only real-time site in the Kaʻū District of southeastern Hawaiʻi Island, where Hurricane Lala destroyed monitoring infrastructure and significantly altered channel conditions, hampering restoration.  💧 Across the Pacific Islands network, 10 sites remain damaged or malfunctioning: 5 real-time stations and five peak-flow-only crest-stage gages. These outages are associated with Hurricane Lowell on Kauaʻi (1 site), Hurricane Lala on Oʻahu (1 site) and Hawaiʻi Island (6 sites), and Typhoon Sinlaku on Guam (2 sites).  Safety is our highest priority. While we’ve been working to restore data flows, we’re also keeping safety in mind as the storm approaches. No USGS staff will be deployed to islands where hurricane conditions are expected until conditions are clear. Stay tuned here to learn more about the USGS response after the storm. 📷 1: Screenshot of precipitation and streamflow conditions on Hawaiian Islands from the USGS National Water Dashboard, September 25, 2026 at 10:30am Central. Credit: USGS 📷 2-3: These photos represent the reality that USGS field crews are facing as they work to restore monitoring equipment in Hawaii. These photos were taken at SF Wailua River near Lihue, Kauai (ID 16060000) site on September 24, 2026. Credit: Tim Brunetto, USGS #Hawaii #Hurricanes #Nolo