Muddy runoff raced down Iron Canyon Road and quickly filled the creek in the Sand Fire burn area.
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Though mandatory evacuations were in place, many residents stayed behind and worked to prevent any potential problems near their homes.
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"The drains get clogged or the water builds up with rocks...We've got a small flood up the street. I'm going to go clear some drains and hope the water will go down," said David Mills, who was at the Sand Fire burn area.
The Santa Clarita Sheriff's Department posted video of Val Verde roads being washed out by the fast-moving water.
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Residents said Friday's round of rain caused a lot of trouble up in the burn area and were hoping they don't get a repeat.
"The rain came alongside our house in Sand Canyon and it moved all our sandbags. So, yesterday we were replacing sandbags. So you know it's coming down fast if sandbags are moving," one resident said.
In the Newhall area of Santa Clarita, a vehicle was swept away by floodwaters for almost 1 mile.
Car swept away by floodwaters in Newhall
It happened around 5 p.m. Friends said the teenage girl inside the Nissan Versa tried to cross the high water when the current caught the car. They said she managed to get out as the vehicle was carried down stream before ending up wedged on rocks.
More heavy rain was expected later in the night, and authorities were in the area patrolling for any potential problems.
People in the Sand Fire area can find shelter at Canyon High School in Santa Clarita at 19300 Nadal St., according to the Los Angeles County Department of Public Works, and animals can be taken to the Castaic Shelter at 31044 Charlie Canyon Rd.
City News Service contributed to this report.