High winds Monday night caused a brush fire to quickly spread in the Santa Cruz River bed near Cortaro Farms Road.

Crews responded to a 911 call just after 9 p.m. and “found a large area of heavy fuels burning below the bridge.  Based on the high winds and the size of the fire, additional units were called in to the scene to assist with extinguishment,” Capt. Adam Goldberg, spokesman for the Northwest Fire/Rescue District, said in a news release.

Hose lines were lowered over the bridge to the attack crews approximately 30 feet below. It took a dozen firefighters about an hour to contain and extinguish the fire.

“Several hot spots required additional attention to ensure that gusty winds would not rekindle the fire,” Goldberg said. “Fire crews were assisted by rains that began to fall as the final hot spots were extinguished.”

The cause of the fire is still under investigation.