While winds associated with former Tropical Storm Mario have faded, moisture from the storm will stream into the southwestern United States to end the week. Some areas will benefit temporarily from rainfall, but excessive rain in others may lead to flooding and other hazards, AccuWeather meteorologists say. Lightning strikes could ignite new wildfires in areas with dry vegetation.

The bulk of the rain in the Interstate 5 corridor of Southern California will occur from Wednesday night to Thursday. In San Diego, the greatest amount of rain will occur on Wednesday night. In greater Los Angeles, it will be on Thursday morning.

Initially, rain mixing with oil residue on roads can create slick conditions, raising the risk of accidents. Then, as the rain pours down, runoff will lead to ponding

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