District Fire Chief Lorne Corbett said the truck struck a Bonanza restaurant in a strip mall about 1:30 a.m. MST, and the fire spread quickly through the other businesses.
The blaze caused an estimated $12 million in damage, the Canadian Broadcasting Corp. reported.
It wasn't known what happened to the truck driver.
Arson investigators were at the scene, the CBC said.
Swim Week Miami Beach 2014 [PHOTOS]