Life-threatening flash flooding will continue and major river flooding will develop from the South into the Ohio Valley this weekend. Severe storms could also produce tornadoes, wind damage and large hail, especially in parts of the South.

Just a small percentage of flood alerts issued by the National Weather Service each year are the highest level called a flash flood emergency warning. They typically signal a damaging, life-threatening event is ongoing or imminent and immediate action should be taken.

Tennessee is in the middle of what will be a dayslong flood disaster, and just look at what all this rain has done to the southern suburbs of Nashville. These clips show how bad the flooding has gotten in Green Hills, and why rescue crews have been called in to pull people out of the floodwaters. Here’s what we know so far.

A portion of the country across the Midwest and South faces multiple days with the threat of severe weather and flash flooding thanks to an upper-level blocking pattern from a high-pressure system in the Atlantic near the Southeast. Because of this pattern, the front has gotten stuck in these regions, with no relief expected until the high-pressure system moves eastward this weekend.

An upcoming pattern change is good news for the severe weather-weary but could be bad news if you have been enjoying unseasonable warmth. Cooler temperatures will return across much of the East with highs more than 10 degrees below average for places like Indianapolis, Columbus, Pittsburgh and Buffalo. Meanwhile, the heat will turn up in the West, with temperatures soaring into the 70s and 80s for places like Denver and Las Vegas – and even reaching the 90s in Phoenix. The best news of all is that no severe weather is expected early next week. Here’s what you need to know.