U.S. Forest Service

With wildfires burning through much of the West, there’s high demand for big aircraft to come in and battle the flames from above.

Over the last 30 years, the West has seen an uptick in the size and frequency of forest fires. Scientists have typically attributed the change to low snowpack and high summer temperatures. But researchers writing in the journal PNAS say the trend could have more to do with rain.

Researchers pulled up maps of forest wildfires from 1979 to 2016 and compared those maps against data on snow, rain, temperature and humidity.

One of the world’s biggest firefighting aircraft is based in Colorado Springs. But it's fighting fires in California right now, rather than in the Mountain West.

For years, Western lawmakers have been trying to change the way we fight wildfires, or at least the way the government funds such work. Now, they may finally get that wish. Congress just passed a measure that would do just that, creating an emergency fund of $20 billion for the Forest Service to fight wildfires over the next decade. It's part of a sweeping new spending deal that the President signed on Friday.

Montana Gov. Steve Bullock has been pushing for years to make this change.