Overview

• The National Weather Service has issued heat advisories or excessive-heat warnings across 29 states, exposing more than 132 million people to heat indices as high as 115°F
• Tampa hit 100°F for the first time on record and Charlotte reached 101°F and 102°F, while feel-like temperatures topped 110°F from Savannah to Minneapolis
• PJM Interconnection and other grid operators issued hot weather alerts and urged power plants to stay on standby to meet surging electricity demand
• Local authorities activated cooling centers and heat emergency plans, advising residents—especially older adults and those without air conditioning—to stay hydrated and seek air-conditioned spaces
• A midweek cold front is expected to break the dome after severe storms and a possible derecho sweep parts of the Midwest, bringing highs down into the 70s by Thursday