What types of airplanes and helicopters are used to put out fires?
Well, first, aircraft don’t put out fires. The best they can do is to slow down a fire to allow firefighters on the ground to get in close and actually put out the fire by applying water from hoses or to physically cut the vegetation away at the perimeter of the fire with hand tools so the fire runs out of fuel to burn. Cal Fire has an excellent publication with photos and descriptions of the most commonly used firefighting aircraft.