Portland reaches the low 80s Tuesday before a brief Wednesday cooldown. Warm, mostly dry weather returns through the weekend.

Nashville faces a near-100-degree Tuesday and a Heat Advisory through Thursday, with highs climbing to 102 by Sunday.

Knoxville will heat up to 92°F Tuesday, with the heat index nearing 102 and thunderstorms possible later in the day. Storm chances continue through the workweek.

Austin faces a 101-degree Tuesday, with heat index values reaching 108 and little rain in sight. Triple-digit temperatures are expected to continue through Monday.

Memphis faces a Tuesday Heat Advisory with a heat index up to 109 degrees, followed by an even hotter weekend.

Oklahoma City faces a 101-degree Tuesday and a heat index up to 106 under a Heat Advisory. Triple-digit temperatures are expected to continue through Monday.

Milwaukee could see strong thunderstorms, damaging winds and localized flooding Tuesday before cooler, drier weather arrives Friday.

Houston will see clear skies, a 95-degree high and heat-index values up to 106 Tuesday. Even hotter, drier weather is building into the weekend.

New Orleans will reach the low 90s Tuesday with a heat index near 105 and a chance of slow-moving afternoon storms. Hotter, drier weather builds through the weekend.

San Antonio is headed for another stretch of triple-digit heat, with a heat index up to 107 Tuesday and little rain relief ahead.

Chicago could see damaging winds, heavy rain and localized flooding Tuesday before a cooler, unsettled stretch arrives later this week.

Dallas faces a Tuesday Heat Advisory and a week of triple-digit temperatures, with highs reaching 103 degrees by Sunday and Monday.

Minneapolis could see a quick morning storm chance Tuesday before temperatures reach 87°F. Cooler air and a wetter pattern arrive later this week.