SoCal Endures Prolonged Humid Heat, Health Risks Rise

Southern California is under a dangerous humid heatwave with temperatures around 100–108°F and humidity boosting the heat index by about 5–10°F. Relief isn’t expected until Friday as a strong high-pressure ridge and moist onshore flow raise dew points into the 70s. Public health officials warn of elevated heat‑related illness risks, especially for the elderly and medically vulnerable, and urge limiting outdoor activity, seeking air-conditioned spaces, hydrating, and cooling the skin; there could be mountain showers and possible flooding later today, with gradual cooling by week’s end but lingering humidity.