Do you have any idea how many helicopters are used in the US for firefighting roughly?
Lots..... I would hazard a guess at a couple hundred in the US. ranging from the Type 1's, (cranes, s-61's, firehawks and K-max), down to the jet rangers doing burn outs and Helco....
My company has a 212, Huey, 2 X L4's and and Jet Ranger, and out sister company has a Huey, B3 astar, couple B2's, L3 and jet ranger----all are on fires during the season.