Large waves caused by a phenomenon known as a “spring tide” hit coastal areas of South Africa at the weekend, killing two people and injuring seven, authorities said on Monday.

According to the weather service, the waves reached up to 9.5 meters, while some of them damaged coastal buildings and swept cars into parking lots.

South Africa’s meteorological service announced that 50% of the country’s coastline was affected by sea waves.

Among the victims was a 93-year-old woman who was injured when a wave swept through a parking lot in the Wilderness area on the country’s south coast, although the National Marine Rescue Institute said her death may have been of natural causes after she was taken to hospital.