"The rapid expansion from 100 to 431 acres in less than 24 hours, coupled with the swift containment to 100% within 48 hours, highlights the effectiveness of the response and the importance of early detection and rapid deployment of resources."
The River Bluff wildfire, located in Atascosa County, Texas, was first discovered on August 31, 2026, and is currently managed by the SFS jurisdictional agency. The fire began at 100 acres with no containment, but grew rapidly to 300 acres by September 1, 2026, before expanding to 350 acres and then 431 acres by the evening of September 1. Containment progressed steadily, reaching 10% at 4:00 a.m., 30% at 5:20 a.m., 40% at 5:00 p.m., 45% at 7:00 p.m., 60% at 8:20 p.m., 80% at 11:40 p.m., and finally 100% containment by 1:40 a.m. on September 2. The fire behavior remained minimal, creeping, and smoldering throughout the timeline, and the cause remains undetermined.
Official source description: 9 Miles E from Devine, TX
Minimal; Creeping; Smoldering
Current air quality readings are unavailable for this incident. Older readings are not shown as current conditions.
Check current air quality on AirNow.gov →The fire is currently minimal, creeping, and smoldering with full containment. General wildfire safety guidance applies, but no immediate evacuation or sheltering is required.
IRWIN ID: {D80805D2-6484-488D-9164-19C9C102CA00}
Discovered: Aug 31, 2026
Cause: Undetermined
Managing Agency: SFS
Coordinates: 29.1598, -98.7756
Other wildfires no longer present in our filtered incident feed in TX.
The River Bluff Fire has burned 431 acres as of September 2, 2026.
Yes, the River Bluff Fire is fully contained (100%).
The official cause has been listed as: Undetermined.
The River Bluff Fire is burning in Atascosa, TX.
The River Bluff Fire is no longer in our filtered incident feed. This alone does not confirm extinguishment.
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