Rock and debris slid down to the roadway at about 8 a.m., closing the northbound 71 transition road to the northbound 57 and the westbound 10 to the northbound 57.
The debris came down during the morning commute, but cars managed to either swerve around or stop before the landslide.
CHP officer Edmund Zorrilla says that as authorities arrived on scene, the hillside began collapsing even more.
Officials said the hillside was completely saturated with moisture. With more rain expected over the weekend, officials are concerned that the landslide may be more of a problem.
The transition roads are expected to be closed for about a week.
People travelling the westbound 10 Freeway can take the Indian Hill offramp and go north to meet the westbound 210 Freeway.
Commuters traveling northbound on the 71 should get off the freeway at Holt and travel east to Indian Hill and then north on Indian Hill to meet the westbound 210 Freeway.
People travelling north on the 57 Freeway will not have any problems. The northbound 57 is not affected.