"The rapid growth from 50 to 350 acres in just a few hours highlights the fire’s aggressive early behavior, and the swift containment to 100% within three days demonstrates effective resource deployment by the SFS agency."
The South Day wildfire, located in Sutton County, Texas, was first discovered on September 5, 2026, and is managed by the SFS jurisdictional agency. The fire began as a natural event and quickly expanded from 50 acres to 350 acres by the early afternoon of September 6, before stabilizing around 77 acres. Containment remained at 10% until the evening of September 6, when it rose to 30% and then 50% the same night. By September 7, containment reached 95% and was fully contained at 100% on September 8, with the fire behavior described as moderate during the final stages.
Moderate
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 now fully contained and behaving moderately; general wildfire safety guidance applies, but residents should remain aware of potential smoke and follow any local advisories.
IRWIN ID: {A2B58710-6C42-4B46-B6F0-FE09DC51FBFB}
Discovered: Sep 5, 2026
Cause: Natural
Managing Agency: SFS
Coordinates: 30.594, -100.898
Other wildfires no longer present in our filtered incident feed in TX.
The South Day Fire has burned 77 acres as of September 8, 2026.
Yes, the South Day Fire is fully contained (100%).
The official cause has been listed as: Natural.
The South Day Fire is burning in Sutton, TX.
The South Day Fire is no longer in our filtered incident feed. This alone does not confirm extinguishment.
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