Minneapolis gets a sunny 80-degree Sunday before a 40% chance of thunderstorms Monday night.

New Orleans faces a dangerous Sunday heat index up to 115 degrees, followed by another day of extreme heat Monday.

Milwaukee starts Sunday cloudy and humid, then gets a sunny Monday before showers and thunderstorms return Tuesday.

Dallas is facing a Heat Advisory Sunday and a week of 103- to 104-degree afternoons. Rain offers little relief, with chances staying near zero through Thursday.

San Antonio will see Sunday highs near 101 degrees, heat index values up to 106 and a week of relentless sunshine.

Oklahoma City could hit 104 degrees Sunday, with a heat index up to 109 and more triple-digit days ahead.

Boston gets a mostly sunny Sunday near 80 before overnight showers usher in a cooler, foggier Monday. Brighter weather returns Tuesday and Wednesday.

Orlando faces a 97-degree Sunday with heat index values reaching up to 112 degrees. Storm chances increase sharply Tuesday and remain elevated through Friday.

Memphis is facing a 102-degree Sunday with a heat index near 114 and an Extreme Heat Warning through 8 p.m. More triple-digit heat follows Monday and Wednesday.

Knoxville faces a 95-degree Sunday with heat-index values near 105, followed by a potentially rough round of storms Monday afternoon and evening.

Nashville is headed for a 102-degree Sunday with a heat index up to 111, followed by storm chances and a brief cooldown Tuesday.

St. Louis could see heat indexes near 109 Sunday as an Extreme Heat Warning remains in effect. Storms may bring heavy rain and gusty winds before Monday’s cooldown.

Foggy skies give way to thunderstorms Sunday in Columbus, with heavy rain and gusty winds possible. A cooler, drier pattern arrives by Tuesday.