Yes, but they can't use saltwater in most cases to fight the fires. That's why not having the reservoirs full and not capturing the billions of gallons of snowmelt they let run into the ocean due to "budget cuts" has real consequences for fighting fires. 

Not only is saltwater less effective as a fire suppressant than fresh water due to not having the same cooling properties, but it's also very hard on the equipment and it can't be used if you'd like to grow anything ever again unless you immediately flush it with freshwater. They, of course, don't have the freshwater to do this or they'd be using it to fight the fires. 😂