Santa Monica officials are preparing to have a crumbling portion of the bluffs above Pacific Coast Highway removed.
The crack in the cliff was noticed by passersby, including Suzanne Yankovic, wife of musician “Weird Al” Yankovic.
Yankovic posted a video of the bluff, which was then seen by Los Angeles County supervisors who decided to alert the City of Santa Monica.
If the cliffside were to collapse, it would be catastrophic to those driving on the freeway below.
It is unclear whether a collapse could occur within days or years, so officials have decided to take action right away.
A crane will be brought in to break apart the top portion of the unstable bluff with debris being hauled away in dump trucks.
That will require the closure of PCH and a portion of the 10 Freeway approaching the coast.
The road closures are expected to begin around 11:30 p.m. and continue until about noon Wednesday.
The roadways should be clear and ready to reopen around that time.