warming increases water vapor humidity in the atmosphere, right?
the phrasing indicates you are ignorant on the topic, so why don't you get educated? you do not indicate if you are talking about absolute humidity or relative humidity. water vapor humidity? that is a redundancy. what other type of humidity is there?
also, warming of what? warming of water bodies increases humidity in the air above it unless it is already at saturation. warming dry land DECREASES the relative humidity in the air immediately above it. the lower the relative humidity, the greater the likelihood of combustion and spot fires. that is why fires burn better on a hot day than a cold one, given the same absolute humidity. when the air cools in the evening, the relative humidity goes back up (known as humidity recovery)and fires are not as active. if the relative humidity is very low, as is often the case in severe fire conditions, say 5% or less, there is not enough absolute humidity to raise the relative humidity very much at night (dependent upon diurnal temperature differential)
i have no idea what the fuck you are jabbering about, other than you grab one tiny portion of the concept in a malaprop manner and then make a fool out of yourself.