Stfu cocksucker, you have some orange around your mouth.
I already researched in the past in wich situation they could be used and why they are never used in urban areas. Even without that you could make an educated guess if you are above 80 iq.
Edit: here you go for exemple.
Professional firefighters called Trump's proposal impractical at best. Deploying the kinds of airplanes used to fight forest fires would be dangerous in an urban area, they said, noting that force of the water could knock the building down and threaten firefighters on the ground.
"The drop of water by air on this type of building could indeed result in the collapse of the entire structure," the French government civil defense agency tweeted.