Brutal heat is gripping the Plains, Southwest and Northern Rockies, with triple digit temperatures expected for many. Heat advisories are in effect from Texas to North Dakota, where heat indices could soar past 100 degrees. Extreme Heat Warnings are now issued for Oklahoma City, Des Moines and Minneapolis, where conditions turn dangerously hot. Out West, extreme heat warnings stretch across the Southwest, including parts of Southern California, as well as the northern Rockies. Stay hydrated and limit your time outdoors. Here's the latest forecast.