Kusilvak Census Area

Every large fire

1. Large fires mapped by the Monitoring Trends in Burn Severity program since 1984: 1,000 acres or more in the West, 500 or more in the East. Prescribed burns are excluded. Acres here are the part of each perimeter inside this place.

Monitoring Trends in Burn Severity (USGS and U.S. Forest Service), 1984 to 2026.

Smoke overhead

1. A smoke day is a date on which a smoke plume traced by NOAA Hazard Mapping System analysts from satellite imagery covered this place's point (the county's population centre or the city centre). Counts here are of medium or heavy smoke. Since 2018 analysts have often drawn light smoke as one area over most of the continent, so light-smoke counts are not comparable from year to year. The plumes show smoke anywhere in the air above, not air quality at the ground, and smoke hidden by cloud is missed.

NOAA Hazard Mapping System smoke analysis, 2011 to 2026, retrieved October 30, 2026.

OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026. NOAA Storm Events through 2026.

River crests

River gauges

1. Crests are the highest and the recent crests the National Weather Service lists for each river gauge in the county that has a flood stage, not every flood. Flood categories use each gauge's current flood stages; crests from before levees, dams or channel changes may not be comparable. Crests measured on an old datum are left out of the rankings.

NOAA National Water Prediction Service gauge records, retrieved October 30, 2026.

Every earthquake of magnitude 4 or more within 50 miles

1. Earthquakes of magnitude 2.5 or more in the USGS Comprehensive Catalog since 1900. Within 50 miles means the epicentre lies within 50 miles of the county boundary (or inside the county).
2. Small earthquakes were under-recorded before the modern seismic networks of the 1970s and are still missed in remote areas, so early decades read low. Magnitudes are as the catalogue reports them and mix scales (moment, local and body-wave).

USGS ANSS Comprehensive Earthquake Catalog, 1900 to present, retrieved October 30, 2026.

Volcanoes within 100 miles

1. U.S. volcanoes within 100 miles, from the USGS Volcano Hazards Program. The threat category is the USGS 2018 National Volcanic Threat Assessment, which ranks volcanoes by how hazardous their past eruptions were and how many people and how much infrastructure lie near them. It is not a forecast of eruption.

USGS Volcano Hazards Program, retrieved October 30, 2026.

Costliest events since 1996

1. Oct 11, 2025High Wind, Lower Yukon River$100,000
   National Weather Service narrative

   On October 11th at 2357AKST, the Reindeer River RAWS station (RDRA2), located 16 miles south-southeast of Pilot Station, recorded sustained winds of 37 mph gusting to 60 mph. Peak winds were recorded at 0557AKST on October 12th with sustained winds of 55 mph gusting to 86 mph. On October 12th at 0649AKST, the St. Mary's-Pitkas Point Airport AWOS (PASM) measured a wind gust of 76 mph. On October 12th at 0625AKST, the USArray fixed Vaisala WXT536 weather station operated by the Alaska Earthquake Center at Wolf Creek Mountain (K15KX), located 38 miles northeast of Russian Mission, recorded a wind gust of 79 mph. Wind damage was reported at Pilot Station and St. Mary's.

2. Oct 11, 2025High Wind, Yukon Delta Coast$100,000
   National Weather Service narrative

   The USArray fixed Vaisala WXT536 weather station, operated by the Alaska Earthquake Center on Kusilvak Mountain (K13KX), reported sustained winds of 45 to 75 mph from the night of October 11th through midday October 12th. A peak wind gust of 107 mph was measured on October 12th at 0554AKST. A wind gust of 66 mph was measured at the Emmonak AWOS site (PAEM) on October 12th at 0456AKST. At the Chevak Airport AWOS site (PAVA), a wind gust of 74 mph was recorded at 0543AKST on October 12th. The Kotlik Airport AWOS (PFKO) measured a wind gust of 81 mph at 0556AKST on October 12th.||At Kotlik, a house was blown from its pilings and came to rest on its roof. A power outage occurred after…

3. Oct 12, 2025Coastal Flood, Yukon Delta Coast$100,000
   National Weather Service narrative

   A Facebook post from a resident of Kotlik at 0258AKST on October 12th indicated that a storage container was lifted and moved by high waters. At Scammon Bay, a member of the public reported minor flooding and a road washout via Facebook at 0602AKST on October 12th. At Emmonak, a member of the public reported high surf and a boat swept away at 1032AKST on October 12th. At Chevak, flooding was reported by a member of the public on October 12th.

4. Oct 7, 2025Coastal Flood, Yukon Delta Coast$5,000
   National Weather Service narrative

   Emergency managers reported at 15:00 local time on October 7th that boats were lost due to flood waters (caused by coastal flooding) inundating low-lying areas of the community.

1. Storm Events records before 1996 cover only tornadoes, thunderstorm wind and hail. Damage figures are as reported by the National Weather Service at the time, not adjusted for inflation.

NOAA NCEI Storm Events Database, 1950 to 2026, issued October 26, 2026.

This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).

OpenFEMA Disaster Declarations Summaries, retrieved October 30, 2026. Statewide declarations are not listed.

Neighbouring counties

• Tornadoes NOAA Storm Prediction Center severe weather database, through 2025.
• Tropical cyclones NOAA National Hurricane Center HURDAT2 (Atlantic; Northeast and Central Pacific), through 2025.
• Wildfire USGS/USFS Monitoring Trends in Burn Severity, through 2026.
• Storm events NOAA NCEI Storm Events Database, through 2026.
• Flood insurance OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026.
• Declarations OpenFEMA Disaster Declarations Summaries v2, retrieved October 30, 2026.
• Weather records NOAA NCEI Global Historical Climatology Network Daily.
• River crests NOAA National Weather Service, National Water Prediction Service river gauges, retrieved October 30, 2026.
• Drought NOAA NCEI nClimDiv county Palmer Drought Severity Index, through September 2026.
• Smoke NOAA NESDIS Hazard Mapping System smoke analysis, retrieved October 30, 2026.
• Volcanoes USGS Volcano Hazards Program, U.S. volcanoes and 2018 threat assessment.
• Earthquakes USGS ANSS Comprehensive Earthquake Catalog (ComCat), retrieved October 30, 2026.

Joins, thresholds and known limits are set out in the methodology. Found an error? Report it. Page built October 30, 2026.