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.
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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