The prolonged heatwaves posed significant health risks, particularly to vulnerable populations such as the elderly and those with pre-existing conditions like cardiovascular disease and asthma. The lack of nighttime cooling exacerbated physical stress, while residents without air conditioning struggled to cope. Extreme heat is a leading global hazard, causing thousands of deaths annually, including 3,900 in California between 2010 and 2019. Coastal areas, once considered safe from extreme heat, are now facing a 'new normal' that demands urgent adaptation.