Caltrans says crews cleared overnight Topanga Canyon slides but acknowledges gaps in real‑time alerts

Caltrans officials told the Topanga Town Council that crews removed debris after two debris flows and a rock slide during a recent rainstorm and reopened Topanga Canyon Boulevard around 1 p.m., but acknowledged shortcomings in real‑time public alerts that left many drivers unaware. “We had 2 debris flows and 1 rock slide … crews were able to remove the debris material and reopen around 1PM today,” Caltrans Public Information Officer Colleen Park said.

Residents and council members described being surprised by the overnight, emergency closure — some said it happened around 2–3 a.m. — and said they received no advance warnings via local radio, Caltrans’ website or social media. One resident said drivers reached the closure with no way to turn around: “It creates really a terrible situation, a dangerous situation,” a council member said, urging better upstream warnings near Fernwood Drive to prevent miles‑long backups.

Colleen Park said Caltrans does not maintain a permanent 24/7 social‑media staffing model for routine events but can activate an Emergency Operations Center during anticipated emergencies. “We’re not staffed 24/7 regularly, but when there are emergency situations … we had 24/7 coverage,” she told the meeting, and added the department will relay community suggestions back to headquarters.

Community members suggested several specific fixes: integrating Caltrans alerts with Apple/Google Maps and local traffic apps, using Caltrans’ QuickMap for faster updates, adding EarthCam‑style live feeds at chokepoints and deploying remotely updateable variable message signs before known turnoff points such as Fernwood. One resident said a live camera would let drivers “very quickly see Topanga Canyon Boulevard is closed and … run a different route.”

Caltrans also cautioned that the agency’s public website is best for long‑term project information and is not always the fastest channel for sudden closures; Park recommended checking QuickMap and Caltrans social accounts for the timeliest updates. The agency said geotechnical teams continue to assess the slope for further damage and that a slope restoration project — repairing a 2024 slide — will begin next week between Fernwood/Pacific Drive and Grandview Drive.

The council thanked Caltrans for the rapid clearance work but said it will follow up on integrating Caltrans messaging with local community channels and emergency notification systems. The council asked Caltrans to explore whether county or city alert systems (including LA Alert) can be used to reach residents more quickly and whether a standing program of live roadside feeds and pre‑positioned signage could be adopted for recurring slide locations.