The fire department was notified of a sprinkler activation and water-flow alarm at the building in the 1400 block of Redwood Road, according to Napa Fire spokesperson Matt Colburn. After the first engine company at the scene saw smoke in a hallway, other firefighters were called to the building, Colburn said.
Sprinklers doused the fire inside an apartment, but about 10 other units had to be vacated due to the resulting flow of water, according to Colburn, who said firefighters stayed for more than four hours to help clear out the water. No injuries were reported.
The cause remains under investigation.
