Intense rainstorms are becoming more frequent in most of the U.S. — though experts say where they occur and whether they cause catastrophic flooding is largely a matter of chance. More than 100 people died in Texas Hill Country over the weekend after 12 inches of rain fell in just hours. Last year, Hurricane Helene dumped more than 30 inches of rain on western North Carolina, where flooding killed 108. Experts say human-caused climate change is setting the stage because a hotter atmosphere holds more water. But it's impossible to predict where flooding will occur in any given year.

Parts of the Midwest and South are facing the possibility torrential rains and life-threatening flash floods. The fresh storms on Friday come as many communities are still reeling from severe tornadoes that destroyed whole neighborhoods and killed at least seven people. Kentucky's governor said floodwaters swept away and killed a boy Friday in his state. Forecasters warned of catastrophic weather on the way, with satellite imagery showing thunderstorms lining up like freight trains. Those who died in the initial wave of storms on Wednesday and early Thursday were in Tennessee, Indiana and Missouri. Forecasters say it was the opening act for days of wild weather that could bring flash floods across the nation's midsection.

A sweeping storm system moving across the U.S. threatens to bring tornadoes, blizzards and possibly wildfires to different regions of the country. The National Weather Service says an outbreak of severe storms ramping up Friday afternoon could spawn tornadoes, with the greatest risk in Missouri and Illinois as well as portions of Iowa, Kentucky, Tennessee and Arkansas. Heavy snow and high winds in the Great Plains could make travel treacherous in the Dakotas and parts of Minnesota. Forecasters say strong winds and warm, dry weather farther south pose a critical risk of wildfires in northwest Texas, Oklahoma and a portion of southeast Kansas. Tornado threats will push into the South on Saturday.

Powerful storms were threatening communities across the country with weather ranging from fire in the Southern High Plains to blizzards in the Midwest. Forecasts on Tuesday also predicted dust storms in the southwest, tornadoes in the South and blizzard conditions in the Central Plains, and were forcing some changes to Mardi Gras in New Orleans. The storms are among the first big tests for meteorologists at the National Weather Service after hundreds of forecasters were fired under President Donald Trump. New Orleans moved up its two biggest Mardi Gras Day parades and cut down their routes to try to avoid the potentially destructive weather.

Thunderstorms are hopscotching around the Southwestern U.S., bringing much-needed moisture to a region where every drop counts. In fact, it's the time of year when Arizona and New Mexico receive about half of their annual precipitation. Northern Mexico logs even more. From church altars and farm houses to city halls, prayers, songs and even festivals are held each year in hopes of having a bountiful monsoon from mid-June through September. The trick this season will be avoiding more devastating flooding in communities that have been ravaged by wildfires in recent years. Forecasters say this monsoon so far is packing a punch.