The remnants of Hurricane Marie have heightened risks for flash flooding in Southern California, particularly during the Labor Day weekend. Coastal areas are facing dangerous surf conditions, which could pose threats to swimmers and surfers, as well as accelerate coastal erosion. The rainfall, while rare for September, has temporarily disrupted the region's typically dry transition from summer to fall. However, the risk of additional widespread rainfall is diminishing as high pressure strengthens over the area. Residents and visitors should remain cautious near coastal zones and monitor updates from local authorities.