Coastal flood advisory hits OC, San Diego

The National Weather Service issued a coastal flood advisory for the Orange County Coast and San Diego County Coastal Areas on Wednesday at 11:46 a.m. The alert covers a period from 1 p.m. on Thursday, Oct. 29, until 2 p.m. on Friday, Oct. 30.

Forecasts indicate that observed high tides will reach 1.4 to 1.6 feet above astronomical tide predictions. The highest water levels are scheduled for 11 a.m. on Thursday and noon on Friday. These conditions are expected to cause minor coastal flooding across the designated zone.

Infrastructure managers and residents in the advisory area must prepare for rising water to protect life and property. The NWS San Diego office stated that numerous roads may be closed during this window. Low-lying property, including homes, businesses, and critical infrastructure, will be inundated. Some shoreline erosion is also anticipated.

The agency advises property owners to take necessary actions to protect flood-prone assets. Drivers should avoid traveling through water of unknown depth. If travel is required, motorists must not drive around barricades. This guidance applies to all vehicle operators in the affected coastal corridors.

A flood advisory signals that flooding is not severe enough to warrant a warning but can cause considerable inconvenience. Without caution, the situation can threaten life or property. This alert level is distinct from a flood watch, which indicates favorable conditions for flooding, or a flood warning, which means flooding is imminent or underway. A flash flood warning is reserved for sudden, violent inundation that may occur within minutes.

Safety protocols for flood-prone regions include moving to higher ground immediately. Residents should adhere to local evacuation orders and secure their homes before leaving. If time permits, disconnecting utilities and appliances minimizes electrical hazards. Individuals should avoid basements and rooms where water has submerged electrical outlets or cords. If sparks or electrical noises occur, occupants should evacuate immediately to avoid water charged with electricity.

Walkers should never attempt to cross floodwaters, even if they appear shallow. Fast-moving water as deep as six inches can sweep a person off their feet. If trapped by moving water, individuals should move to the highest available point and call 911. Drivers should be aware that 12 inches of rapidly flowing water can carry away most cars. This risk persists during heavy rainfall in low-lying and flood-prone areas.

The advisory remains active until 2 p.m. on Friday. The NWS monitors these conditions through publicly available data. Local authorities will issue specific evacuation orders as water levels rise. Property managers and infrastructure operators should track tide predictions closely to coordinate protective measures.