Downtown Los Angeles could hit 99°F Wednesday as extreme heat and elevated ozone persist through Friday. A cooler weekend is finally on the way.

Denver gets a hot, stormy Wednesday before temperatures climb into the mid-90s by Friday and Saturday.

Salt Lake City will hit 97 degrees Thursday before weekend thunderstorms bring a sharp cooldown.

St. Louis climbs to 92 Wednesday, then gets a sunny two-day cooldown before temperatures surge back into the mid-90s next week.

A new underwater valve lets Prospect Park staff drain the lake in under 36 hours before storms, saving 800,000 gallons of tap water daily.

Chicago faces scattered storms Wednesday, with the strongest activity possible from afternoon into early evening. Sunny, cooler weather arrives Thursday.

Nashville could hit 94 degrees Wednesday before storm chances increase Thursday. A sunnier, hotter stretch follows into next week.

San Antonio faces a 102-degree Wednesday under a Heat Advisory. Storm chances return Thursday, but the weekend heat is already waiting.

Austin is under a Heat Advisory Wednesday as temperatures climb to 104 degrees. A limited storm chance arrives Thursday, but the triple-digit heat sticks around.

A breezy Wednesday leads into sunny weather through Friday, followed by warmer temperatures and scattered thunderstorms this weekend.

Storms could hit Memphis twice Wednesday, with damaging winds possible before a sunny, hotter weekend arrives.

Knoxville reaches 90 Wednesday before storm chances rise Thursday and Friday. A hotter, mostly sunny stretch follows into next week.

Houston will hit 100 degrees Wednesday as the heat index climbs near 107. Storm chances increase Thursday night and Friday, but the weekend remains hot.