Started on Jul 31, 2026.
United States todayLive
True view
Fire view
Fire view (right): infrared (SWIR), sees through smoke and brings out the heat.
🟢 green = vegetation
🟤 brown = already burned
🟠 orange = fire right now
Drag to compare: normal photo on the left, heat brought out on the right.
Green: vegetationBrown: already burnedOrange: fire right nowSentinel-2 · Copernicus
Red dots: heat detected by satellite in the last 48h. NASA FIRMS
Quick facts
- Location
- 22 miles east of Sheridan, WY
- Cause
- Natural
- People working on it
- 4 people
- Complexity
- Type 3 IncidentOfficial scale from 5 to 1: a Type 1 is the most complex in the country.
- What's burning
- Short Grass (1 foot)
- How it's behaving
- MinimalRunning — Runs along the ground much faster than a person walks.Flanking — Grows along the sides, not head-on.
- Jurisdiction
- Private land
Glossary: what each term means
Barely moving. Low, thin smoke.
Burning without flame, in the ground or in roots. Can flare up days later.
Moves slowly, hugging the ground.
Spreads with low, steady flames.
Spreading evenly and steadily, with visible flame.
Fast and unpredictable.
Runs along the ground much faster than a person walks.
Grows along the sides, not head-on.
Moves against the wind or downhill, which makes it slower.
Climbs into the treetops and jumps crown to crown. It can't be attacked from the ground.
Climbs into the crowns in bursts and drops back down.
Whole trees flaring up like torches.
Single scattered trees flaring up whole, like torches.
Whole clumps of trees flaring at once.
Wind carries embers through the air and starts new fires ahead of the front: that is how a fire jumps a road or a firebreak.
The wind pushes it in long runs in one direction.
The ones marked ● are the behaviors that make a fire harder to stop. They are not a warning or an instruction: they are the description written by the agency in charge. For decisions, always follow your emergency services.
Spanning 7,285 acres of private land in Sheridan County, the Lumin Fire has now achieved full 100 percent containment after burning for nine days 22 miles east of Sheridan, Wyoming. Averaging approximately 809 acres per day of growth, the Type 3 Incident was managed by a Type 3 Team utilizing four personnel and incurring a total cost of $1,100,000. Fire behavior on the short grass terrain, which featured one-foot fuels, was characterized as minimal, running, and flanking before crews successfully halted its progression following its start on July 31, 2026.
The Lumin Fire unfolded against a broader national backdrop for the typical fire season, which runs from June to October. Across the country, 2,702,782 hectares have burned so far in 2026, marking a total that sits 51 percent below the two-decade average.
In context
This wildfire burned in Wyoming for 39 days. In total it burned about 7,285 acres — around 29 km².
In the Northern Hemisphere, wildfire activity usually peaks during the warm, dry months — roughly May through October.
The bigger picture in United States
Across United States, roughly 3,243,965 hectares have burned so far in 2026 — 41% below the two-decade average. Data from Copernicus GWIS.
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Community reports
Reports from people near the fire · unverified
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Not official emergency information. In an emergency, contact fire services/authorities.
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