Washington D.C. faces a heatwave with the heat index reaching up to 104 degrees, leading to possible heat-related illnesses and prompting preparations like cooling shelters.

The National Weather Service issued an extreme heat warning for several counties around Tampa, with index values over 112 degrees, advising caution against heat-related illnesses.

Atlanta faces a hot, stormy week with a 20% chance of afternoon showers and thunderstorms, peaking at 97°F today. High humidity and continued thunderstorms expected throughout the week.

Orlando faces an extreme heat wave, with warnings for heat illness and peak index values reaching 110-115 degrees. There's a slight chance for afternoon relief with a 30-40% chance of rain.

Cleveland's weather forecast includes a heat advisory, a cold front midweek with possible precipitation, and rough Lake Erie conditions, followed by calmer weather and a return to the 80s by Sunday.

Indianapolis is under a Heat Advisory with heat index values up to 105 degrees; fog affected morning visibility. Storms with potential wind gusts are forecasted for midweek.

The National Weather Service in Memphis issued an Extreme Heat Warning for various regions until 6 AM CDT Thursday, with risks of high heat indices, advising caution.

Mixed weather conditions, including heat and storms, are forecasted for the Baltimore region by the National Weather Service, with a cold front bringing cooler temperatures and breezes by Friday.

A heat advisory is in effect for central North Carolina due to high temperatures with heat index values of 105-109 degrees, prompting warnings for residents to stay cool and hydrated.

Extreme heat warning issued for parts of Florida and Georgia, with heat indices up to 116 degrees. Residents advised to stay hydrated, seek AC, and avoid strenuous activity.

The National Weather Service issued an extreme heat warning for Middle Tennessee, advising of heat index values up to 113 degrees and the risk of heat-related illnesses.

Austin is forecasted to have a hot and sunny week, with highs near or exceeding 95 degrees, and minimal evening relief. The NWS advises residents to stay cool and hydrated.

New Orleans officials offer a Heat Relief Map to help residents find air-conditioned spaces during a heat wave.