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Manhattan Beach details post-refinery alert upgrades after Chevron IsoMAX fire
Summary
After the Oct. 2 IsoMAX fire at the Chevron El Segundo refinery, city and regional partners described new notification protocols: holding-statement templates, enhanced SOPs across Alert South Bay, IPAWS/WEA geofenced warnings, Genesis Protect zone mapping and staffing improvements to enable faster, more coordinated alerts.
City emergency-management staff and regional partners told the City Council on March 3 that they have implemented a suite of changes to strengthen rapid notifications to residents after the October 2025 Chevron IsoMAX unit fire.
Alexandria Letronia, the city's communications and civic engagement manager, described a multi-layered alert strategy that combines Alert South Bay (the regional Everbridge instance), the federal Integrated Public Alert and Warning System (IPAWS/WEA), MBTV, social media, push-notification apps, and physical message boards. "Alert South Bay is a regional system that is utilized by 15 cities in the South Bay region," she said.
Brian Stock, director of Chevron's El Segundo refinery, presented Chevron's internal investigation findings and the company's corrective steps after the Oct. 2 fire. Stock said a localized piping failure caused by hydrogen sulfide sulfidation corrosion combined with flow geometry led to the leak and fire; Chevron replaced the piping with more corrosion-resistant alloy and added inspection locations. "What's important is that today, we know the cause of the failure, and we know how to prevent it from happening again," Stock told council members.
Regional Alert South Bay administrator Soraya Sutherland and El Segundo division chief (speaker 34) described immediate operational improvements: ready-made holding-statement templates for incidents, clarified notification triggers and thresholds, and cross-jurisdiction standard operating procedures that FEMA and the state praised as "one of the most comprehensive" in reviews. The holding statements are intended to be sent quickly to advise residents to "go indoors and await further information" while incident commanders complete size-up and unified-command decisions.
Staff also outlined Genesis Protect mapping (18 city zones) with a public-facing portal to show which zone is being affected and where shelters or reentry points are located. Fire Chief Jesse Alexander emphasized that field commanders must get the protective action right (shelter-in-place versus evacuation) because reversing incorrect orders risks public harm.
Public-safety officials said they have layered redundancies for outages or cyber incidents: county/state emergency alert centers, AM/FM EAS systems, NOAA weather radio, door-to-door notifications, and physical community portals if digital systems fail. El Segundo said it now maintains an on-call communications roster and off-duty division chiefs with portable equipment (including Starlink and battery backups) to ensure 24/7 push capability.
What happens next: staff will continue outreach to older adults and vulnerable communities, distribute "Know Your Zone" materials, and run training and drills across partner agencies. Chevron confirmed it will fund equipment and personnel to support the improved community-alerting system.
