Lassen · Incident start: July 18, 2026
Northeast of Susanville, a small change in the acreage estimate attracted less attention than the work that made containment credible. Crews walked control lines looking for heat that might undermine them.
What the incident record shows
One update paired a revised 69,352-acre estimate with 97% containment. The summary subsequently listed 69,355 acres and 98%. Meanwhile evacuation restrictions had been lifted. The three-acre revision is too small a signal to reconstruct a new run of fire; the field observations tell us much more about what crews were doing.
Reading the figures
The CAL FIRE incident summary updated August 4, 2026 lists 69,355 acres and 98% containment. These are historical reporting figures.
The state page relays a federal incident. Its last percentage is a dated observation, not evidence that crews stopped work with two percent of the perimeter unsecured.