The extreme heat poses significant risks to millions of residents across affected areas, particularly in major metro regions like Phoenix and southern California deserts. Vulnerable groups, including outdoor workers, older adults, and children, are at heightened risk of heat-related illnesses such as heat cramps, heat exhaustion, and heat stroke. The timing of the heat wave during Mother’s Day weekend increases the likelihood of exposure as families plan outdoor activities. Health officials warn that prolonged exposure to such high temperatures can quickly escalate into medical emergencies if precautions are not taken.