Across the West, the increasing prevalence of invasive plants, and the growing influence of climate change, is changing the relationship between vast rangelands, drought, and wildfire.

For many communities in the West, the water that flows out of kitchen faucets and bathroom showerheads starts high up in the mountains, as snowpack tucked under canopies of spruce and pine trees. This summer’s record-breaking wildfires have reduced some of those headwater forests to burnt trees and heaps of ash.

National Park Service hydrologist Erin White likes to call Yellowstone “America’s first water park.” It’s home to the headwaters of multiple major rivers…

Correcting mistakes of the past is often tougher than it sounds. Almost two decades later, those involved in responding to the Rodeo-Chediski Fire say they’re still learning what it will take to get ahead of wildfires, and the effects they have on headwater forests.

Major wildfires have burned through the Western U.S. in 2020, breaking records for their scale and damage. As firefighters tamp down their immediate effects, those who live nearby are coming to grips with the lingering danger of wildfires. Even long after the flames are gone, residents face a serious increase in the threat of flooding.