Fix the Elemental Wheel

[Vanguard319]

Water doesn't cause fire to spread in any way. Fire dies when it's not exposed to oxygen (wind), which is what water does, it smothers it so it can't use the oxygen in the air (wind) as one of it's chemical reagents. Though the same thing can be said of earth, that would also smother fire. But you don't see firefighters spraying sand on housefires. You also don't see them using compressed air.

Perhaps not, but firefighters sometimes use explosives to put out certain types of fires (i.e. certain chemical fires that would react to water/foam), the shockwave literally removes all the immediate oxygen in the area, (sometimes the fuel as well.) snuffing out the flames.

or to simplify: wind kills fire.

Edit: I forgot to mention this but you don't necessarily need plain oxygen to keep a fire going, the correct term is oxidizing agent. (for example, many chlorates are even more reactive than oxygen and will often ignite on contact with anything combustible, and could be the kind of chemical fire that can't be extingushed by conventional means.)