City of Vancouver FIREBOAT 1 (FB-1), going under Lion’s Gate Bridge from Burrard Inlet into Vancouver Harbor, Vancouver, British Columbia, Canada on August 31, 2018.

FIREBOAT 1 (FB-1) is FireStorm 40 built by MetalCraft Marine, one of 2 fireboats purchased by the City of Vancouver in 2016.
More info at Wikipedia topic “Fireboats of Vancouver.”