In the West, Northeast, Midwest and even the South, states experienced downpours, blizzards and flash floods this month. Research suggests those events will only become more common.

By Kristoffer Tigue

Winter storm and flood alerts continue this week for millions of Americans following a weekend of flash floods in states such as Pennsylvania and Illinois, where many residents were forced to evacuate their homes as they took on water. It’s the third weekend this month when large swaths of the country have been doused with extreme wintry conditions—a trend that’s becoming increasingly more likely because of climate change, recent analyses show.