The fire was reported around 2 p.m. near West Virginia Street and McLellan Avenue, dispatcher Michael Wodnick said.
It was controlled by 3:25 p.m. and contained by 4:15 p.m., Wodnick said.
It apparently burned vegetation in a creek area of the Guadalupe River.
Wodnick said, "A lot of homeless people live there and for various reasons they start fires every once in a while," but could not confirm how it started.
No injuries were reported.