Twin Sisters Fire
The Twin Sisters Fire was reported on June 13, 2026 in Walla Walla County, Washington and burned 8,262 acres. It is 100 percent contained. The cause is listed as human.
- Size
- 8,262 acres
- Contained
- 100%
- Discovered
- June 13, 2026
- Personnel
- 6
Map
Perimeter mapped June 14, 2026 at 7:31 AM PDT, 8,116 acres (gps-flight). Point of origin 46.057, -118.910.
The incident
- Size
- 8,262 acres
- Containment
- 100%
- Discovered
- June 13, 2026 at 10:35 PM PDT
- Cause
- Human
- Location
- 5 Miles S from Wallula, WA
- County
- Walla Walla County
- State
- Washington
- Protecting agency
- SHP
- Land ownership at origin
- Private
- Personnel assigned
- 6
- Incident management
- Type 3 Team, Type 3 Incident
- Primary fuel
- Short Grass (1 foot)
- Estimated cost to date
- $600,000
- Incident type
- Wildfire
- Unique fire identifier
- 2026-WAWFS-260222
- IRWIN identifier
- 40432B79-397F-4C30-8667-2DCE4A76A6FE
Growth
Mapped area at the last perimeter of each day, from June 14, 2026 (3,638 acres) to August 3, 2026 (8,116 acres). The largest one-day growth was 4,625 acres, mapped June 15, 2026.
| Day | Acres | Change |
|---|---|---|
| June 14, 2026 | 3,638 | |
| June 15, 2026 | 8,262 | +4,624 |
| June 17, 2026 | 8,116 | -146 |
| August 3, 2026 | 8,116 | 0 |
Weather in the area
This fire is no longer listed as current. The forecast for Finley, WA covers the area today.
Nearby
- Finley, WA9 miles northwest of the fire’s origin
- Burbank, WA11 miles northwest of the fire’s origin
- Highland, WA11 miles northwest of the fire’s origin
- Kennewick, WA15 miles northwest of the fire’s origin
- Pasco, WA16 miles northwest of the fire’s origin
- West Pasco, WA18 miles northwest of the fire’s origin
Washington wildfires today Wildfires of 2026 All current fires
Incident record from the National Interagency Fire Center’s Wildland Fire Interagency Geospatial Services (WFIGS), as the incident’s managers report it; last updated August 24, 2026 at 2:17 PM PDT. Identifier 2026-WAWFS-260222.