California heat wave triggers Heat Advisories and Extreme Heat Warnings through October 8
A long-duration October heat wave is affecting California under an anomalous ridge over the western United States, with Heat Advisories and Extreme Heat Warnings in effect from Northern and Central California into Southern California. The NOAA/NWS Weather Prediction Center (WPC) forecasts October 3 as the hottest day of the short-range period, with temperatures about 8–11°C (15–20°F) above normal and some valleys reaching approximately 42°C (107°F).


