A fire at a Kent business burned so hot early Friday that it partially collapsed the roof, according to Puget Sound Regional Fire Authority.
Crews were called about 3:20 a.m. to the 24800 block of Pacific Highway South after an automatic fire alarm sounded. A police officer patrolling the area confirmed there was heavy smoke and flames.
About 30 percent of the roof had already collapsed by the time firefighters arrived, which meant they sounded a second alarm in case the blaze spread to two nearby businesses.
Crews attacked the fire with hoses while standing on ladders and were able to put it out quickly.
One firefighter sprained his ankle during the fire attack and was treated on scene. No other injuries were reported.
Investigators are working to determine what started the fire.
Stacia Glenn: 253-597-8653