The Biscar Fire began in Lassen, California on July 18, 2026, and has burned 12,338 acres with 5 percent containment. Homes in the affected area face direct fire damage as the fire continues to spread.
Overview written from official NASA EONET and National Interagency Fire Center/IRWIN data.
- Type
- Wildfires
- Official size
- 69,352 acres
- Containment
- 100%
- Cause
- Undetermined
- Began
- Status
- Ongoing
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Affected area map
The shaded area is the affected-area perimeter reported for this event by NASA EONET (Lassen, California), colored by hazard type. Pan and zoom to explore the map; when more than one observation exists, use the slider below to step through how the reported area changed.
Interactive affected-area map
Lassen, California · ≈ 110 sq mi reported extent · Enable JavaScript to explore the map.
2026-07-24 23:46 UTC · ≈ 110 sq mi · snapshot 5 of 5
View the timeline — how the reported area changed
Official size & containment
Official incident size and containment reported through NIFC / IRWIN, as we observed it. Newest first.
- 69,352 acres ±0 100% contained
- 69,352 acres ±0 99% contained
- 69,352 acres ±0 98% contained
- 69,352 acres ±0 98% contained
- 69,352 acres ±0 98% contained
- 69,352 acres ±0 97% contained
- 69,352 acres ±0 92% contained
- 69,352 acres −3 92% contained
Show 10 earlier observations
- 69,355 acres +11 89% contained
- 69,344 acres ±0 68% contained
- 69,344 acres +24 42% contained
- 69,320 acres +113 10% contained
- 69,207 acres +10,329 5% contained
- 58,878 acres +18,878 5% contained
- 40,000 acres ±0 5% contained
- 40,000 acres ±0 5% contained
- 40,000 acres +27,662 5% contained
- 12,338 acres 5% contained
Shown as reported by our sources — not an official product. For current advisories and the authoritative map, see NASA EONET ↗.
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Latest updates
Official updates and news coverage for this event, newest first — National Weather Service products, local storm reports, incident updates and press headlines. Official items are verbatim government text; news headlines link out to the original outlet.
- Incident update InciWeb
Biscar
Links - Daily Update (pdf) | Daily Informational Map (pdf) | Fire Progression Map | Daily Operations Update (video) The Biscar Fire started from a lightning strike on July 18, 2026 within Lassen County. It grew quickly with warm temperatures and strong winds pushing it eastward across Highway 395. It is currently mapped at 69,352 acres with 97% containment.Fire Activity: Fire activity has been minimal despite elevated fire weather conditions. Containment lines around the fire continue to be reinforced. Crews have been checking integrity of the containment lines using a tactic called “cold trailing,” where fire fighters walk along these lines to verify that no heat persists. About 200 firefighters were released Sunday, and additional 200 were released Monday and made available to other fires in the region. Resources continue to be made available for reassignments today as they finish their tasks on the Biscar Fire. A National Preparedness Level 5 (Highest Level) indicates a significant amount of fire activity nationally with resources (crews, engines, aircraft) mostly being committed; and therefore fewer resources available to respond to new ignitions.California Interagency Incident…
Updates are captured automatically from official and news sources, and may lag the live source. For the very latest, see NASA EONET ↗.