The storm that brought days of rain to the Southland has moved on, but a stretch of La Tuna Canyon Road near Sun Valley will likely remain closed through the weekend while engineers determine if an adjacent hillside collapse has compromised the roadway.

The landslide occurred around 4 p.m. Wednesday on the slope just south of the roadway about a mile west of the Foothill (210) Freeway. The road itself did not give way, but a roughly 75-foot-long section of hillside collapsed, creating a 45-foot high cavern just south of the street.

No one was injured in the collapse, which occurred in an open area that was already under evacuation orders. The roadway had already been closed due to the incoming storm.

According to Los Angeles City Engineer Gary Lee Moore, it’s still unclear exactly why the hillside collapsed, but water continued to drain through the canyon Friday.

Crews plan to begin pumping water out of the collapsed area on Saturday, “which will allow us to assess the stability of the site,” Moore said.

“If the hillside and road are deemed stable, the goal is to reope4n all of a portion of La Tuna Canyon Road by Monday,” Moore said.

The city Bureau of Engineering plans to provide updates on the work at www.facebook.com/LABureauEngineering.

Flash flood watches that had been in effect across much of the county were canceled early Friday as rain moved out of the region.

The storm generated differing amounts of rain in L.A. County since the rain began Tuesday afternoon — 3.90 inches in Newhall, more than 2 inches near Malibu, between 1.5 and 4 inches in L.A. County valleys, 1.5 to 2 inches in coastal areas, and 1.15 inches in Downtown L.A., said NWS meteorologist Curt Kaplan, adding that the recorded volume of rain in the San Gabriel Mountains in Ventura County was 6.5 inches.

“It’s rare to get major rains this late in the season,” which starts in October, he said.

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