The National Weather Service (NWS) issued a flash flood warning from 1:40 p.m. to 3:45 p.m. for eastern Harrison County, including the cities of Gulfport, Biloxi and Long Beach after two to nearly five inches of rain fell in just one hour.
Officially at the Gulfport airport, 6.06 inches of rainfall was recorded on Sunday with 4.65 inches of that falling between 1 p.m. to 2 p.m., according to the NWS.
Flooding with vehicles stranded and stalled in high water were reported across the area, including along parts of U.S. Highway 90 and 49, the Sun Herald reported.
Harrison County Emergency Management Director Rupert Lacy said flooding was a major issue on Courthouse Road north of the railroad tracks, on Indiana Street in north Gulfport, and on Highway 90 in front of the Beau Rivage and the Hard Rock casinos, according to WLOX-TV.
Just east of Gulfport and Biloxi, firefighters were called to rescue two elderly people and a caregiver from Rose Drive in Moss Point as flood waters filled the streets. Some streets reportedly had more than a foot and a half of water on them, although there were no reports of water inside any homes.
The City of Gulfport Public Works Department were providing sandbags at 4050 Hewes Avenue to residents to protect their homes and property.
With a tropical air mass in place across the region, any thunderstorms that develop will be capable of producing excessive amounts of rainfall in a short period of time.