The fire broke out in the 260 block of Rexmont Road in Cornwall just after 8 a.m., according to emergency dispatchers.
Rexmont Road and Wenger Street have been closed as crews remained on the scene.
Drivers have been asked to avoid the area.
There is no word on how many structures were involved or if anyone was hurt, although the initial broadcasts reported people trapped and multiple dwellings involved. should avoid the area.
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