The heat wave poses significant risks, particularly for vulnerable populations such as the elderly, children, and those with pre-existing health conditions. Prolonged exposure to high temperatures and humidity can lead to heat-related illnesses, including heat exhaustion and heat stroke. Urban areas like San Francisco may experience additional discomfort due to the heat island effect, while inland regions such as the East Bay face the highest temperatures. Residents are urged to stay hydrated and avoid outdoor activities during peak heat hours.