According to the Monterey County Sheriff's Office, water was 4 feet deep in some parts of the road from heavy rainfall.
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It happened at around 3 p.m. on Wednesday.
Highway 101, south Salinas in the community of Chualar, was shut down in both directions. Southbound lanes reopened before 8 p.m.
Mary Starck tweeted that she was stuck in traffic, traveling 15 miles an hour because of the flood. We spoke to her on the phone.
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"So, I sat there for I think approximately three and a half hours," she said. "I did see on the 101 North that it looked like a lake as we were driving by."
No major injuries have been reported. Several homes and a school were affected.
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