Fire Weather Watch — Sweetwater County/Rock Springs BLM/Flaming Gorge NRA; Natrona County/Casper BLM; Upper Wind River Basin/Wind River Basin was recorded by Global Incident Tracker on Sunday, 13 September 2026 at 07:00 UTC. The event is classified as a wildfire incident with a severity rating of Severe, and was detected through the US National Weather Service (NWS).
Fire Weather Watch issued September 13 at 1:00AM MDT until September 14 at 8:00PM MDT by NWS Riverton WY The National Weather Service in Riverton has issued a Fire Weather Watch, which is in effect from Monday afternoon through Monday evening. * IMPACTS: Low Humidities and Strong Gusty Winds could cause erratic fire behavior. * AFFECTED AREA: In Central WY Fire Zones...280...283...289...300. In Southwest WY Fire Zone....279. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In Southwest WY...Sweetwater. * WIND: West 20 to 30 mph with gusts up to 40 to 45 mph. * HUMIDITY: As low as 12 percent.
Where this happened
The incident is located in United States (North America), whose capital is Washington, D.C.. Historically, United States is most affected by hurricanes, wildfires, tornadoes, earthquakes and floods. You can follow every incident recorded in this country, updated live, on the United States incident tracker.
Approximate coordinates of the reported event are 37.100°, -95.700°. The marker on the map above shows this position; for news-derived reports the location reflects the place named in media coverage and may represent a district or city rather than an exact site.
Understanding wildfire events
Uncontrolled vegetation fires in forest, bush, grass or peat. Wildfire behaviour is driven by three things: fuel (dry vegetation), weather (heat, low humidity, wind) and terrain. Wind shifts are what most often turn a controlled perimeter into an emergency, which is why evacuation orders can change very quickly.
How severity is rated
Global Incident Tracker rates every event on a four-step scale — Minor, Moderate, Severe and Extreme — derived from the source signal: earthquake magnitude, official GDACS alert colour, or the volume of independent media reporting for news-derived incidents. This event is currently rated Severe. Ratings can change as more information becomes available, and a rating is a monitoring signal rather than an official government assessment.
Safety guidance for wildfire situations
- Leave early if advised — late evacuation on smoke-filled roads is the most dangerous option.
- Close windows and vents, remove flammable items from around the building and wet down the perimeter if time allows.
- Wear cotton, long sleeves and an N95-type mask; smoke harms lungs long before flames arrive.
- Keep a packed bag, full fuel tank and two separate escape routes planned.
- Follow only official instructions from local authorities and emergency services — this page is a monitoring record, not an emergency alert.
Data and verification
This record was generated automatically from the US National Weather Service (NWS) and de-duplicated against our archive. Early reports for any incident can be revised: locations get refined, magnitudes are recalculated and impact figures change as assessments arrive. We deliberately do not publish casualty numbers unless an official source states them. The original source report is linked at the top of this page.
Keep watching the situation on our live world incident map, browse every wildfires we track on the Wildfire tracker, or see today's global picture on the incidents today page.
Timeline and sources
Official warning
Issued by U.S. National Weather Service. A warning or forecast describes a hazard; on its own it is not a report that harm occurred.
How statuses are decided · the number of reports is never treated as confirmation.
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· received · event time 13 Sep 2026, 07:00 UTCFirst report Official warning
First recorded from U.S. National Weather Service.
Times are when this site received each report, in UTC; the event time is shown where the source gave one. Copies of one syndicated story count as one report.
Conditions at the time
Light rain of 0.7 mm was recorded, and the temperature peaked at 36°C. Conditions are shown for context only — they do not establish a cause.
Weather reanalysis for this location and date via Open-Meteo.