The heat wave poses significant health risks, particularly for vulnerable populations such as the elderly, children, and those without access to cooling. Over 100 million people are under 'major' or 'extreme' heat risk levels, spanning from the Deep South to the Northeast. Urban areas may experience exacerbated conditions due to heat retention in concrete and asphalt. Prolonged exposure to these temperatures can lead to heat exhaustion, heat cramps, and heat stroke. Emergency room visits for heat-related illnesses are expected to surge, especially during outdoor activities planned for the holiday weekend.