King Tides Push Water Into Homes and Streets on Both Coasts

Seawater has flowed across roads and into residential and commercial properties in beach communities along both U.S. coasts this week. The intrusion of ocean water has disrupted daily life in Florida, California, and the Carolinas. Forecasters indicated that these conditions could persist into the weekend, affecting areas from Huntington Beach to Charleston.

The flooding began following the full moon earlier this week. King tides occur when the Earth, moon, and sun align, creating stronger gravitational pulls that raise water levels. These events happen multiple times a year and typically last for several days. However, meteorologists stated that additional atmospheric and oceanic factors intensified the impact this week.

In Florida, a high-pressure system to the north and low pressure over the Caribbean increased swells, according to Chris Fisher, a National Weather Service meteorologist in Miami. On the California coast, the current super El Niño event has warmed the ocean, increasing the volume of seawater. Roger Gass, a meteorologist with the Bay Area forecast office in Monterey, identified Kelvin waves as another contributing factor. These waves are pulses of warm water that elevate sea levels.

Residents in Huntington Beach, California, placed sandbags outside their homes on Wednesday to prevent water from entering. Some locals used paddleboards and surfboards to travel through flooded streets. Portions of the Pacific Coast Highway were closed, with tides expected to approach record levels in Orange and San Diego counties. Further north, the weather service predicted minor flooding in low-lying shoreline areas through Saturday. Gass noted that high tides in Northern California are peaking 1.9 feet above normal.

Most of Florida's Atlantic coast remained under flood warnings through early Friday. Street flooding was reported in South Carolina coastal cities, including Charleston and Myrtle Beach. Rip currents were possible as far north as North Carolina's Outer Banks. In Fort Lauderdale, drivers navigating to a major boat show had to pass through flooded streets near marinas and hotels.

Virginia Key, a barrier island in Miami, recorded its highest king tide and third-highest water level since records began three decades ago. Fisher stated that only hurricanes have produced higher levels in the past three decades. He described the event as historical from a king tide perspective. Fisher also warned that beach conditions would remain rough through the weekend, advising people to stay out of the water.

The combination of gravitational alignment and specific weather patterns has created a complex flooding scenario. While king tides are a regular natural occurrence, the current intensity is driven by localized atmospheric and oceanic conditions. Residents in affected areas are monitoring water levels closely as the week progresses.