From AZ Central an explanation and video of how the sprinkler system was set off by an atypical monsoon on Saturday.
Phoenix Fire Capt. Reda Bigler said a pipe in the ceiling of the building’s fifth floor ruptured when the storm lifted the roof and caused it to move in a wave-like fashion.
“When (the roof) slammed back down it broke a sprinkler pipe,” Bigler said. “That caused about 50 to 60 gallons a minute of water to start flowing through the building.” All five stories were affected.
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