From my understanding the water towers had completely ran out of water and pumps couldn't keep up. There's was no issue with volume through the existing water system, there's just no way to contain a fire that big. They should be taking preventative measures such as raking the forest.
How come I can find videos of Russian be 200 everywhere, but I've never seen anything similar in US?
I'm confident US has no such planes ( or no good ones) or they are too expensive in US or some bullshit issues like imminent domain preventing them refilling in lakes nearby.