The coastal flood advisory poses risks to beachgoers and residents near the shoreline, with hazardous surf and rip currents creating dangerous conditions. Urban runoff has significantly increased bacteria levels near storm drains, creeks, and rivers, prompting a general rain advisory for all coastal beaches and bays. Residents are advised to avoid water contact activities such as swimming, surfing, and diving for 72 hours after the rain. Inland, the storm caused traffic accidents, downed power lines, and mudslides, highlighting the potential for further disruptions. The risk of Santa Ana winds later in the week could exacerbate fire hazards and create additional challenges.