HIGH RISK FLOOD THREAT 🚨: The Mississippi coastline is under a rare Level 4 out of 4 High Risk flood threat as remnants of Post-Tropical Storm Arthur continue fueling hazards through late week. FOX Weather Correspondent Brandy Campbell brings us the latest live from Biloxi, Mississippi, where rain is already falling: #Mississippi #floodthreat #rain #SevereWeather #FoxWeather