The extreme heat poses significant risks to public health, particularly for those without access to cooling or hydration. Emergency room visits for heat-related illnesses are expected to surge, and heat-related deaths could rise, as heat is the deadliest weather hazard in the U.S. The heat wave is also worsening wildfire risks and straining water and energy resources, especially in the parched Colorado River Basin. Lake Mead and Lake Powell, critical water reservoirs, are at historic lows, and the heat will accelerate evaporation. Coastal areas in California face additional hazards from large waves and rip currents due to Hurricane Genevieve.