Coastal areas in California are at high risk of flooding due to elevated sea levels and potential storm surges during high tides. Inland regions face a 'wild card' scenario, with the odds of significant flooding higher than usual but not guaranteed. Atmospheric river storms, which are key drivers of flooding, may occur in clusters, increasing the risk of back-to-back storms overwhelming watersheds. Residents in flood-prone areas are advised to prepare for potential disruptions and property damage.