The heatwave poses significant risks to human health, particularly in Southern California, where high humidity is amplifying the physiological burden of heat. Coastal areas may experience record-high overnight temperatures, with lows struggling to drop below 70-75°F (21-24°C). Inland regions, including Death Valley, could see record-breaking daytime highs, potentially nearing 130°F (54°C). Elevated fire risks are also a concern, with vegetation drying rapidly across California. Northern California and the Pacific Northwest face heightened wildfire threats due to dry conditions and strong winds.