Here is a Longmont Colorado firetruck. And here is the St. Vrain River massively overflowing past its banks. Will the firetruck stop? Hell no.
I am only assuming that this firetruck has an engine snorkel, because otherwise I have no clue how it's managing to keep running.
But I really shouldn't worry. They have their windshield wipers on.
Watch This Colorado Firetruck Drive Through A Massive Flood