ssa nuesca, her son james, and the rest of the family had to run for cover >> the most terrifying part was when the hill gave out, and the road was just gone. >> we thought we were going to get buried alive in the mud. we just thought it was done. the mud was coming down so fast, and the car filled up so fast. >> reporter: it could take days, workers tell me, to remove all the mud, debris, and cars from the roadway here. but, scott, they are moving fast because more rain is in the forecast today. >> pelley: carter evans reporting for us tonight. carter, thank you. and we're likely to see a lot more of that because the weather service says we are experiencing one of the strongest el ninos on record. an el nino happens when the pacific ocean warms, changing weather all across the nation. it will bring more downpours to the west, which ben tracy says has many californians looking uphill. >> when it comes down, it's not going to stop. >> reporter: ed heinlein is getting ready to battle this-- the 850-foot mountain behind his home in azusa, california. he has built steel-reinforcement impac