Tornado Alley (PROG)

[SilverSurfer]

warming increases water vapor humidity in the atmosphere, right?
so in general world wide, not specific to any particular fire area...

Since moisture can lower the chances of a wildfire igniting, precipitation has a direct impact on fire prevention. When the air becomes saturated with moisture, it releases the moisture in the form of rain. Rain and other precipitation raise the amount of moisture in fuels, which suppresses any potential wildfires from breaking out.

http://www.ipcc.ch/publications_and_data/ar4/wg1/en/ch3s3-4-2-1.html

http://science.howstuffworks.com/nature/natural-disasters/wildfire2.htm

Higher humidity on Friday helped slow the growth of a large wildfire in Northern California that the authorities said was set deliberately and had forced about 2,800 people to evacuate. The wildfire 60 miles east of Sacramento has burned through nearly 120 square miles of timber and vegetation and is 10 percent contained. Wayne Huntsman, 37, the man suspected of starting the blaze, pleaded not guilty to arson.

http://www.nytimes.com/2014/09/20/us/california-wildfires-progress-slowed-by-humidity-.html?_r=0