Extreme Heat Warning in Effect for Southern California Valleys and Inland Empire

An Extreme Heat Warning has been issued by the National Weather Service for San Bernardino and Riverside County Valleys-The Inland Empire, effective from October 4, 2026, at 4:28 AM PDT until October 8, 2026, at 8:00 PM PDT. Dangerously hot conditions are expected, with high temperatures reaching the upper 90s to 103°F and warm nights in the low to mid-70s, increasing the risk of heat-related illnesses.