All lanes of Topanga Cyn closed nightly from PCH to Grand View 6/24 - 6/27 for Caltrans slope restoration work. Take detours. 
Caltrans will close Topanga Cyn from Pacific Coast Highway (PCH) to Grand View Dr. for emergency slope repair and restoration, nightly, Monday, June 24 to Thursday, June 27 between 10:00 PM and 5:00 AM. All work is weather permitting and subject to change. Expect delays, and use alternate routes. Signs will be posted advising motorists to use US-101, Las Virgenes Road, and Malibu Canyon Road as alternate routes. Motorists should expect delays and are strongly advised to use alternate routes or avoid the area. The town of Topanga will remain open to motorists.
Address/Location
City of Malibu Emergency Services
23825 Stuart Ranch Rd
Malibu, CA 90265
Contact
Emergency: 9-1-1
Non-emergencies: 310-456-2489