A massive fire broke out at an apartment complex in San Antonio Thursday afternoon, officials said.
The blaze began around 1 p.m. at the complex in Bexar County, KSTAT reported.
Residents recalled they received an alert to turn off their water heater, and the fire erupted on the second floor moments later, fire officials said.
About 50 residents were evacuated from the building.
Firefighters had to usher in water to extinguish the flames because a nearby fire hydrant was frozen, according to WOAI-TV.
Videos and photos on social media shows black smoke billowing into the sky as fire crews work the scene.
No injuries have been reported. Officials continue to investigate what caused the blaze.