Hot and stormy weather pressed on Sunday as summertime conditions fuel severe thunderstorms in parts of the United States while the Southwest faces another week of intense heat.

The active weather pattern of heat and humidity is threatening a large area of the central United States with severe thunderstorms into the early week, AccuWeather said. Hail, gusty winds, and some tornadoes are expected to impact a smaller portion of the region.

But heavy and excessive rainfall in addition to damaging winds are the main severe weather threats for parts of the East.

The Central Plains into portions of the Mississippi and Tennessee valleys will be targeted by severe weather conditions through Sunday night, according to AccuWeather. The National Weather Service issued flash flooding warnings and watches Sunday for parts of the Northeast.

And in the Southwest, sweltering conditions are again increasing temperatures above average with triple digit heat expected into the week. Scorching temperatures are expected to cause “widespread moderate to high heat risk” and locally, extreme risks in the deserts, according to the weather service.

“The source of this upcoming heat is a large, sprawling ridge of high pressure positioned over the Southwest,” said AccuWeather meteorologist Andrew Johnson-Levine. “This will help to keep most showers or storms at bay and allow for sunny skies that will help boost temperatures.”

Meanwhile, other dangers affected the southern regions of Florida and California.

A massive dust cloud from Africa’s Sahara Desert reached South Florida on Saturday, causing hazy skies. In Southern California, a landslide Saturday night forced 12 homes to evacuate after cracks were found forming on a property.

Severe weather: Northeast under flash flooding alerts

Parts of the Northeast were on high alert for flash flooding risks, according to the weather service.