Started on Jul 15, 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
- 5 miles north of Tierra del Sol, CA
- People working on it
- 256 people
- Complexity
- Type 3 IncidentOfficial scale from 5 to 1: a Type 1 is the most complex in the country.
- What's burning
- Brush (2 feet)
- How it's behaving
- Minimal
- 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.
Expanding at an average rate of 309 acres per day over the last four days, the THORN Fire has consumed 1,234 acres of private brush land five miles north of Tierra del Sol, California. Currently managed as a Type 3 incident near Live Oak Springs in San Diego County, the blaze is showing minimal fire behavior as 256 personnel work to secure the perimeter.
With 85 percent containment achieved, the active operation has incurred costs totaling $4,183,408 since ignition on July 15, 2026. A Type 3 team continues to oversee suppression efforts on the two-foot brush fuel beds.
In context
This wildfire burned in California for 75 days. In total it burned about 1,234 acres — around 5.0 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 3,372,253 hectares have burned so far in 2026 — 38% 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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