OC Extreme Heat and Coastal Compound Hazard Weekend
Inland Orange County remains under an Extreme Heat Warning through August 2; the coast carries concurrent Heat Advisory, High Surf, and Coastal Flood advisories. SCE outages are active across multiple cities and a West Nile Virus health alert compounds public-health risk countywide.
NWS San Diego (weather advisories), SCE (outage reporting), OC Health (West Nile alert), OC Vector Control (mosquito warning), City of Santa Ana (cooling centers). Highest-risk populations: residents without air conditioning, older adults, children, people with chronic illness.
Multi-hazard event: NWS Extreme Heat Warning (inland) and Heat Advisory (coast) through August 2, concurrent High Surf and Coastal Flood advisories, SCE power outages in at least six cities, and an OC Health alert for early and intense West Nile Virus activity.
Orange County, California — inland areas under Extreme Heat Warning; coastal areas (Newport Beach, Huntington Beach, Seal Beach, Laguna Niguel and south) under Heat/Surf/Coastal Flood advisories; outages confirmed in Tustin, Santa Ana, Huntington Beach, Irvine, La Habra, Costa Mesa, and Newport Beach.
Heat warnings and advisories in effect from July 28 through August 2, 2026. King tide cycles continue through early August. Outages reported July 30 beginning ~09:00 UTC.
A persistent high-pressure ridge is driving dangerous inland heat; coastal swell and astronomical king-tide alignment are compounding coastal hazards. Elevated grid demand during the heat wave is stressing the SCE distribution network. Warm conditions are accelerating West Nile Virus transmission cycles.
As of the evening of July 30, 2026, Orange County remains in an active multi-hazard situation with no new evidence of improvement. The inland Extreme Heat Warning remains in effect through August 2, and the coastal zone continues to carry a Heat Advisory alongside High Surf and Coastal Flood advisories. Seven SCE-reported power outages — in Tustin, Santa Ana, Huntington Beach, Irvine, La Habra, Costa Mesa, and Newport Beach — remain associated with this event, consistent with elevated grid demand during sustained heat.
NWS San Diego's Extreme Heat Warning covers Orange County inland areas, indicating dangerous heat conditions with temperatures likely exceeding safe thresholds for prolonged outdoor exposure. The concurrent Heat Advisory for the OC coast means even residents seeking relief at the beach face above-normal heat. Residents without air conditioning, older adults, children, and those with chronic illness face the greatest risk. The City of Santa Ana has activated cooling centers through at least August 2, according to a city announcement.
A High Surf Advisory and Coastal Flood Advisory are both active for Orange County coastal areas. Evening king tides are forecast near 6.0–6.1 ft (MLLW) — 6.1 ft at approximately 21:43 on July 29 and 6.0 ft at approximately 22:15 on July 30 — capable of producing minor flooding of low-lying coastal areas, beach access paths, and parking lots. The combination of high surf and tidal surge elevates risk for beach visitors, a particular concern given that inland heat is likely driving higher-than-normal beach attendance.
SCE has reported outages in Irvine (~09:00 UTC), Santa Ana, Huntington Beach, and Newport Beach (~09:30 UTC), Costa Mesa (~09:45 UTC), La Habra (~10:51 UTC), and Tustin (~21:00 UTC) on July 30. Loss of air conditioning during an Extreme Heat Warning is a life-safety concern. Residents in affected areas should check SCE's outage map for restoration estimates.
OC Health has issued a health alert noting early and intense West Nile Virus activity this season, coinciding with the heat event. Warm conditions accelerate mosquito breeding cycles. OC Vector Control has also issued public warnings. Residents spending time outdoors — including at cooling locations — should use repellent and avoid peak mosquito hours.
- Continuation or expansion of SCE outages as heat persists through the weekend
- King tide cycles on subsequent evenings through early August
- Any NWS upgrades to coastal flood or surf advisories
- OC Health updates on heat-related illness counts or West Nile case escalation
- Jul 27, 20:00(3 days ago)
Voice of OC reports OC Mosquito Control warns of West Nile Virus activity.
- Jul 28, 00:00(3 days ago)
Multi-hazard event period begins; heat, surf, and coastal flood conditions develop across Orange County.
- Jul 29, 21:38(1 day ago)
City of Santa Ana announces cooling centers activated through August 2 in response to Extreme Heat Warning.
- Jul 29, 23:18(about 24 hours ago)
OC Health issues communicable disease health alert: early and intense West Nile Virus activity confirmed for 2026 season.
- Jul 29, 23:31(about 24 hours ago)
NOAA tide forecast: king tide of 6.1 ft (MLLW) predicted at ~21:43 local time July 29 for OC coastal stations.
- Jul 30, 09:00(about 14 hours ago)
SCE reports power outage in Irvine; additional outages follow in Santa Ana, Huntington Beach, and Newport Beach by 09:30 UTC.
- Jul 30, 09:12(about 14 hours ago)
NWS San Diego issues Extreme Heat Warning for OC inland areas and Heat Advisory for OC coastal areas.
- Jul 30, 09:45(about 14 hours ago)
SCE reports power outage in Costa Mesa.
- Jul 30, 10:51(about 12 hours ago)
SCE reports power outage in La Habra.
- Jul 30, 20:08(about 3 hours ago)
NWS issues High Surf Advisory and Coastal Flood Advisory for Orange County and San Diego County coastal areas.
- Jul 30, 21:00(about 2 hours ago)
SCE reports power outage in Tustin.
- Jul 30, 21:01(about 2 hours ago)
NOAA tide forecast: king tide of 6.0 ft (MLLW) predicted at ~22:15 local time July 30 for OC coastal stations.
- FLD16 minutes agoSIG 60
Today's tides — Low -0.5ft @ 04:51, High 4.2ft @ 11:16, Low 2.1ft @ 16:09, High 6.0ft @ 22:15
- PWRTustinabout 2 hours ago
16 customers affected — Upgrading Equipment
- CSTabout 3 hours ago
Coastal Flood Advisory issued July 30 at 1:08PM PDT until August 1 at 3:00AM PDT by NWS San Diego CA
- CSTabout 3 hours ago
High Surf Advisory issued July 30 at 1:08PM PDT until August 1 at 5:00PM PDT by NWS San Diego CA
- AQISaddleback Vlyabout 10 hours agoAir Quality — Moderate (AQI 61)
AQI 61 Moderate — PM2.5
- PWRLa Habraabout 12 hours ago
16 customers affected — Equipment Problems
- PWRCosta Mesaabout 14 hours ago
94 customers affected — Pole Upgrade
- PWRSanta Anaabout 14 hours ago
75 customers affected — Cable Upgrade
- PWRHuntington Beachabout 14 hours ago
23 customers affected — Upgrading Equipment
- PWRNewport Beachabout 14 hours ago
29 customers affected — Upgrading Equipment
- WTHabout 14 hours agoSIG 64
Heat Advisory issued July 30 at 2:12AM PDT until August 2 at 8:00PM PDT by NWS San Diego CA
- WTHabout 14 hours agoSIG 69
Extreme Heat Warning issued July 30 at 2:12AM PDT until August 2 at 8:00PM PDT by NWS San Diego CA
- PWRIrvineabout 14 hours ago
174 customers affected — Upgrading Equipment
- WTHabout 19 hours agoSIG 61
Heat Advisory issued July 29 at 9:00PM PDT until August 2 at 8:00PM PDT by NWS San Diego CA
- FLDabout 24 hours ago
Today's tides — Low -0.6ft @ 04:24, High 4.0ft @ 10:52, Low 2.2ft @ 15:33, High 6.1ft @ 21:43
- HTHabout 24 hours ago
CD HEALTH ALERT: Early and Intense West Nile Virus Activity; New West Nile Virus Diagnostics July 29, 2026 mi.le Wed, 07/29/2026 - 16:18 Body Key Messages:Multiple detections of West Nile Virus (WNV)-positive mosquitoes in Orange County and a much higher-than-usual number of human WNV cases in Calif
- NEW1 day ago
The National Weather Service has issued an extreme heat warning for inland Orange County areas, including Santa Ana, from 10 a.m. Friday, July 31 to 8 p.m. Sunday, Aug. 2. Conditions are expected to be dangerously hot, with high temperatures in the mid to upper 90s east of the 5 freeway. Heat relate
- NEW3 days ago
Orange County sign in Brea. " data-large-file="https://i0.wp.com/voiceofoc.org/wp-content/uploads/2021/08/OC_leopo.jpg?fit=771%2C434&ssl=1" /> West Nile Virus is spreading across Orange County as the season’s temperatures rise. Voice of OC is Orange County's nonprofit newsroom. We rely on donations
- NOAAKing Tide Forecast — 6.0ft at 22:15
- SCEPower Outage — Tustin
- NWSCoastal Flood Advisory — San Diego County Coastal Areas; Orange County Coastal
- NWSHigh Surf Advisory — San Diego County Coastal Areas; Orange County Coastal
- NWSHeat Advisory — Orange County Coastal
- NWSExtreme Heat Warning — Orange County Inland
- NWSHeat Advisory — Orange County Coastal
- OC HEALTHOC Health: CD HEALTH ALERT: Early and Intense West Nile Virus Activity; New West Nile Virus Diagnostics
- NEWSSanta Ana: Extreme heat warning July 31 to Aug. 2, 2026: Beat the heat at City cooling centers
- NEWSVoice of OC: Orange County Mosquito Control Warns of West Nile Virus