California · Active · 1,055 acres
3-1 Pit Fire, California
1,055
Acres reported
98%
Contained
0
Acres since yesterday
Last updated · refreshed every 15 minutes from the NIFC WFIGS feed · awareness only — follow local authorities
Update ·
As of Aug 18, 2026, 09:15 UTC, the 3-1 Pit Fire is listed as active at 1,055 acres, 98% contained, in Lassen County, California.
No change in reported size or containment since Aug 17, 2026, 09:00 UTC.
The most recent mapped perimeter (Jul 16, 2026, 19:23 UTC) covers 1,055 acres; the mapped perimeter has been updated 2 times since the fire began.
No satellite heat detections matched to this incident in the last 24 hours (last one Jul 8, 2026, 10:56 UTC).
3-1 Pit Fire map
The most recent mapped perimeter (solid) and the previous day's perimeter (dashed), with the reported point of origin.
Latest perimeter Previous perimeter · Perimeters come from the WFIGS interagency perimeter service and are usually mapped once a day; the mapped area can differ from the reported acreage.
Key facts
- Size
- 1,055 acres
- Containment
- 98%
- Status
- Active
- Discovered
- Jul 7, 2026
- Location
- Lassen County, California
- Origin point
- 40.9488, -121.2685
- Perimeter mapped
- Jul 16, 2026 (33 days ago)
- Satellite heat, 24 h
- none matched
Nearest towns
Distances are from the reported point of origin, not from the fire’s edge (see the perimeter map for the current extent).
- Burney, CA
- Chester, CA
- Shingletown, CA
- Westwood, CA
- Susanville, CA
Other fires nearby
- Loomis Fire
3-1 Pit Fire daily history
The largest size and containment reported each UTC day, from our 15-minute archive of the federal feed (first seen Jul 7, 2026, 20:45 UTC).
| Day (UTC) | Reported size | Change | Contained |
|---|---|---|---|
| Aug 18, 2026 | 1,055 acres | 0 | 98% |
| Aug 17, 2026 | 1,055 acres | 0 | 98% |
| Aug 16, 2026 | 1,055 acres | 0 | — |
| Aug 15, 2026 | 1,055 acres | 0 | — |
| Aug 14, 2026 | 1,055 acres | 0 | — |
| Aug 13, 2026 | 1,055 acres | 0 | — |
| Aug 12, 2026 | 1,055 acres | 0 | — |
| Aug 11, 2026 | 1,055 acres | 0 | — |
| Aug 10, 2026 | 1,055 acres | 0 | — |
| Aug 9, 2026 | 1,055 acres | 0 | — |
| Aug 8, 2026 | 1,055 acres | 0 | — |
| Aug 7, 2026 | 1,055 acres | 0 | — |
| Aug 6, 2026 | 1,055 acres | 0 | — |
| Aug 5, 2026 | 1,055 acres | 0 | — |
| Aug 4, 2026 | 1,055 acres | 0 | — |
| Aug 3, 2026 | 1,055 acres | 0 | — |
| Aug 2, 2026 | 1,055 acres | 0 | — |
| Aug 1, 2026 | 1,055 acres | 0 | — |
| Jul 31, 2026 | 1,055 acres | 0 | — |
| Jul 30, 2026 | 1,055 acres | 0 | — |
| Jul 29, 2026 | 1,055 acres | 0 | — |
| Jul 28, 2026 | 1,055 acres | 0 | — |
| Jul 27, 2026 | 1,055 acres | 0 | — |
| Jul 26, 2026 | 1,055 acres | 0 | — |
| Jul 25, 2026 | 1,055 acres | 0 | — |
| Jul 24, 2026 | 1,055 acres | 0 | — |
| Jul 23, 2026 | 1,055 acres | 0 | — |
| Jul 22, 2026 | 1,055 acres | 0 | — |
| Jul 21, 2026 | 1,055 acres | 0 | — |
| Jul 20, 2026 | 1,055 acres | 0 | — |
| Jul 19, 2026 | 1,055 acres | 0 | — |
| Jul 18, 2026 | 1,055 acres | 0 | — |
| Jul 17, 2026 | 1,055 acres | 0 | — |
| Jul 16, 2026 | 1,055 acres | 0 | — |
| Jul 15, 2026 | 1,055 acres | 0 | — |
| Jul 14, 2026 | 1,055 acres | 0 | — |
| Jul 13, 2026 | 1,055 acres | 0 | — |
| Jul 12, 2026 | 1,055 acres | 0 | — |
| Jul 11, 2026 | 1,055 acres | 0 | — |
| Jul 10, 2026 | 1,055 acres | 0 | — |
| Jul 9, 2026 | 1,055 acres | 0 | — |
| Jul 8, 2026 | 1,055 acres | +485 | — |
| Jul 7, 2026 | 570 acres | — | — |
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3-1 Pit Fire questions, answered from the data
How big is the 3-1 Pit Fire?
As of Aug 18, 2026, 09:15 UTC, the 3-1 Pit Fire is reported at 1,055 acres. No change in reported size or containment since Aug 17, 2026, 09:00 UTC.
Is the 3-1 Pit Fire contained?
Not fully. It was 98% contained as of Aug 18, 2026, 09:15 UTC. Containment is the share of the fire's edge that has a control line; it is reported by the incident team and can lag the ground situation.
Where is the 3-1 Pit Fire?
The reported point of origin is at 40.9488, -121.2685 in Lassen County, California. Nearest towns: Burney (21 mi W), Chester (44 mi S), Shingletown (45 mi SW). The map on this page shows the most recent mapped perimeter.
Is the 3-1 Pit Fire still burning?
The federal feed still lists it as active as of Aug 18, 2026, 09:15 UTC; no satellite heat detections were matched to it in the last 24 hours.
Where do I find evacuation orders for the 3-1 Pit Fire?
From the county sheriff and local emergency management, not from this site. Check the official California sources on our California page and your county’s alert system. FireRiskHere is for awareness only.
How current is this page?
The numbers come from the National Interagency Fire Center's WFIGS incident feed and the WFIGS perimeter service, refreshed every 15 minutes, plus NASA FIRMS satellite detections hourly. This page was last updated Aug 18, 2026, 09:15 UTC. Acreage and containment are what the incident team reports and can lag by hours.
About this page
This page is generated automatically for every wildfire whose reported size reaches 1,000 acres, from FireRiskHere’s archive of the National Interagency Fire Center’s WFIGS incident feed (captured every 15 minutes), the WFIGS interagency perimeter service, and NASA FIRMS satellite detections. It stays online after the fire is contained as a record of the incident. Nothing here is an official notice — for evacuation orders and road closures follow your county sheriff and local emergency management. How the site works →