NWS Issues 7-Day Heat Advisory for Orange County and San Diego Valleys as Highs Hit 100
Updated
Updated · OCRegister · Jul 20
NWS Issues 7-Day Heat Advisory for Orange County and San Diego Valleys as Highs Hit 100
3 articles · Updated · OCRegister · Jul 20
Summary
Wednesday through July 27, the advisory covers the Santa Ana Mountains and foothills, Orange County, and San Diego County inland valleys, with daytime highs of 95 to 100 degrees.
Upper-60s to low-70s overnight lows are expected to limit relief, prompting the National Weather Service to warn of widespread moderate HeatRisk with localized major HeatRisk.
The agency said the heat could trigger heat illness and urged residents to drink water frequently, take shaded breaks, and avoid alcohol and caffeine.
The alert fits a broader Southern California heat wave already forecast to intensify this week, with tropical moisture and warm coastal waters adding to muggy conditions.
Trapped between record inland heat and dangerous coastal surf, where can residents find safe refuge?
What makes mysterious 'nocturnal drying events' a firefighter's worst nightmare during a heatwave?
Extreme Heat and Dangerous Surf Hit Southern California: July 21–24, 2026 Weather Emergency Report
Overview
Starting July 21, 2026, the region will face a significant dual threat of extreme weather, combining a severe heat wave and hazardous surf conditions. This situation requires heightened public awareness and preparedness. The heat wave is expected to last through July 24, bringing dangerously high temperatures and increasing the risk of wildfires, especially as dry vegetation and gusty winds make any ignition likely to escalate quickly. At the same time, hazardous surf will create dangerous conditions along the coast. Together, these threats demand strong community response to protect public safety and infrastructure.