Flash Floods Trigger Mudslides In Southern California03:54
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In a photo provided by Caltrans, water and mud cover Interstate 5 at Fort Tejon, about 75 miles north of downtown Los Angeles, on Thursday, Oct. 15, 2015. Flash flooding sent water, mud and rocks rushing across Interstate 5, stranding hundreds of vehicles and closing the major north-south thoroughfare. (Caltrans via AP)
In a photo provided by Caltrans, water and mud cover Interstate 5 at Fort Tejon, about 75 miles north of downtown Los Angeles, on Thursday, Oct. 15, 2015. Flash flooding sent water, mud and rocks rushing across Interstate 5, stranding hundreds of vehicles and closing the major north-south thoroughfare. (Caltrans via AP)
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Nearly 40 miles of Interstate 5 in Southern California were shut down last night after flash flooding sent mud and rocks down onto the roadways. More than 100 people were stranded and some cars were trapped in up to six feet of mud.

Dr. Greg Postel of The Weather Channel tells Here & Now's Robin Young about the weather systems that led to the flash floods and how the upcoming El Nino may affect the region this winter.

Guest

This segment aired on October 16, 2015.

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