A fire ripped through a popular Montrose thrift store, leaving one firefighter injured.

About 100 firefighters responded to the fire at the Vintage Shop in the 1500 block of Westheimer started around 12:45 a.m. Friday.

Investigators said it took a while for fire crews to get it under control. One firefighter was treated on the scene for smoke inhalation and dehydration. Officials said he's expected to be fine.

"We live right down the street, smelled the smoke, saw the fire trucks and came down to look at it," said Sam Irwin, who witnessed the fire.

The building has an apartment on the second floor.

Dale Jenkins with the Houston Fire Department said everyone made it out before the flames got too bad.

"It's all wood, so it's difficult to get to the center of the fire," said Jenkins. "We did have three occupants inside the house when the fire started, and they were able to make it out on their own."

Crews shut down Westheimer near Dunlavy while arson investigators gathered evidence and tried to figure out what cause the fire.