Parts of Ventura County, Calif., were evacuated early Thursday as heavy rainfall inundated roads and homes in the region, local authorities said, while forecasters warned that the storm would continue to pummel parts of Southern California through Friday evening.

Ventura County was hit hard overnight by a storm system that is moving along the California coast, with downtown Oxnard receiving a month’s worth of rainfall — more than 3 inches — in less than an hour, according to the National Weather Service in Los Angeles.

An evacuation order and evacuation warnings were issued in parts of the city of Port Hueneme in Ventura County. At 1:28 a.m., the National Weather Service issued tornado warnings for parts of Ventura County including Oxnard because of an intense thunderstorm, but no tornado was detected. Those warnings, and the evacuation order, have since been lifted.

The city of Oxnard said on Thursday that the heavy burst of rain had inundated many homes and roads, and that some parts of the county were still experiencing periods of “moderate” rain. Some vehicles became stuck on the roads, leading to evacuations and rescues, according to local authorities.