Downtown L.A. cools to the low 80s Wednesday before a sunny weekend warm-up. Morning clouds and coastal fog may linger.

Phoenix gets a storm chance and a Flood Watch north and east of the Valley before temperatures surge back toward 110 degrees next week.

Clouds and a hint of drizzle give way to a warmer, mostly sunny stretch across Portland through the weekend.

Seattle’s clouds should clear Wednesday before a warm, mostly sunny stretch peaks Friday near 82 degrees. A small rain chance returns Monday and Tuesday.

St. Louis could hit 97°F Wednesday with a heat index near 110°F, while isolated thunderstorms may bring gusty winds. Dangerous heat continues through Thursday.

A microscopic Gulf alga rarely seen this far north has state officials warning Jacksonville residents to watch for burning eyes and dead fish.

El Paso gets a slight break from triple-digit heat Wednesday, but storm chances build through the weekend. Mountain areas face the greatest risk of localized flooding.

Salt Lake City could see afternoon thunderstorms Wednesday before a much wetter Thursday. Drier, warmer weather returns for the weekend.

Chicago starts Wednesday with fog and clouds before a fast-moving round of thunderstorms arrives. Damaging winds and heavy rain are possible through the afternoon.

New Orleans faces a 93-degree Wednesday with a chance of afternoon storms, followed by a hotter and mostly dry stretch into next week.

Austin is facing a long run of triple-digit heat, with highs near 100 to 102 degrees through next week.

Milwaukee’s foggy Wednesday morning should clear into a partly sunny afternoon, but storms return this weekend.

Oklahoma City faces a 102°F Wednesday, a hotter Thursday and a Heat Advisory through Friday. Triple-digit afternoons are expected to continue into next week.