A megadrought has sapped water supplies, ravaged farms and ranches, and fueled wildfires across the American Southwest for going on 25 years. Not in 12 centuries has the region been so dry for so long.

Now comes worse news: Relief might still be decades away.

According to new findings published in the journal Nature Geoscience, the dry spell is no mere bout of bad luck.

Instead, it seems to be the result of a pattern of Pacific Ocean temperatures that is “stuck” because of global warming, said Victoria Todd, a doctoral student in paleoclimatology at the University of Texas at Austin who led the new research. That means the drought could continue through 2050, perhaps even 2100 and beyond — effectively, Todd said, for as long as humans keep heating up the planet.

In their study, Todd and her colleagues set out to understand a different dry period in the region’s deep past. For clues, they looked to mud from the bottoms of two lakes in the Rocky Mountains: Stewart Bog in New Mexico and Hunters Lake in Colorado.

— Tbe Associated Press