SAN JOSE -- After a morning that already saw two significant fires -- including a massive five-alarm warehouse blaze -- duty called crews out Thursday evening for a condominium fire that left one unit gutted and two damaged in South San Jose.

The fire was reported around 5:50 p.m. at a complex on the 1100 block of Trevino Terrace, near the intersection of Almaden Expressway and Camden Avenue. Crews arrived to find the middle unit of a triplex bursting with smoke and flames and quickly called a second alarm.

"When we got there, there was literally fire flowing out of everywhere you can imagine," said San Jose fire Capt. Mike Van Elgort.

While firefighters couldn't save that unit, the dwellings on either side will be habitable after some repairs, Van Elgort said. Seven people, including two children, were displaced. Three lived in the middle unit, which was a total loss. None of the residents were injured or needed to be rescued, and all were able to find a place to stay through friends or relatives, he said.

One firefighter was transported to the hospital for treatment of an unspecified injury and is in stable condition, Van Elgort said.

"It was an extremely high-volume day," he said. "We are doing our best to keep our people functional."

Van Elgort said it has "been a while" since crews have had to respond to so many major calls in rapid succession, and added that the warehouse blaze on Julian Street -- which took 100 firefighters to get under control -- was "in the top three or four I've been to."

The source of the condominium fire was traced to a malfunctioning dryer, Van Elgort said. It was under control shortly after 8 p.m., but crews remained at the scene late Thursday, mopping up the fire from outside the building because damage to the floors, walls and roof make entering treacherous.

Contact Eric Kurhi at 408-920-5852. Follow him at Twitter.com/erickurhi.