Lingering thunderstorms pose risk of mudslides in areas around Los Angeles recently ravaged by wildfires Lingering thunderstorms pose risk of mudslides in areas around Los Angeles recently ravaged by wildfires A powerful atmospheric river weather system has mostly moved through California but not before causing at least six deaths and dousing much of the state. Early Monday lingering thunderstorms pose the risk of mudslides in areas of Los Angeles county that were recently ravaged by wildfire.