Started on Jul 7, 2026.
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
Active fires nearby3 · 100 km
Quick facts
- Location
- 5 miles south of Lac la Croix, MN
- Cause
- Natural
- People working on it
- 3 people
- Complexity
- Type 4 IncidentOfficial scale from 5 to 1: a Type 1 is the most complex in the country.
- What's burning
- Closed Timber Litter
- How it's behaving
- MinimalSmoldering — Burning without flame, in the ground or in roots. Can flare up days later.Creeping — Moves slowly, hugging the ground.
- Jurisdiction
- USFS · Federal 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.
Burning for 63 days near Ely, Minnesota, the Thumb Fire has reached 25,015 acres with an average daily growth of approximately 397 acres per day. Located 5 miles south of Lac la Croix in St. Louis County, the natural-cause fire is currently 100 percent contained. Fire behavior is noted as minimal, smoldering, and creeping through closed timber litter on federal land managed by the USFS.
Operations for this Type 4 Incident are overseen by a Type 4 IC with a reduced personnel of 3 individuals, reflecting the stable conditions of the blaze. The total cost to manage the fire has reached $4,450,205.
This incident occurs within a broader national context where 3,188,211 hectares have burned so far in 2026, marking a figure 42% below the two-decade average for the country, which typically experiences its fire season from June to October.
In context
This wildfire has been burning in Minnesota for 71 days. So far it has affected roughly 25,015 acres — about 101 km². The perimeter is 100% contained.
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 3,226,886 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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