A tropical storm formed along the US Gulf Coast on Saturday, bringing heavy rains and flooding to coastal states including Louisiana, Mississippi and Alabama.
The National Hurricane Center in Miami said in a 4am advisory that the storm was located 75km southwest of New Orleans with maximum sustained winds of 75kmph.
Flooding had already begun overnight on Friday with reports of high water over roads and stranded vehicles. Flash flood warnings dotted the coast while flood watches were in effect well inland for parts of Mississippi, Alabama, Florida, and central and northern Georgia.
The storm, churning northward in the Gulf of Mexico, is likely to dump anywhere from five inches to 10 inches of rain along with parts of the Gulf Coast and even 15 inches in isolated areas, according to forecasters at the National Hurricane Center.
In Louisiana, the threat came a month after spring storms and flooding that were blamed for five deaths, and as parts of the state continued a slow recovery from a brutal 2020 hurricane season.
Tropical Storm Cristobal that opened the season last June, hurricanes Laura and Delta that devastated southwest Louisiana, and Hurricane Zeta that downed trees and knocked out power for days in New Orleans in October.
Mexico, while getting rain from the storm in the Gulf, also was threatened by a storm in the Pacific.
Tropical Storm Dolores formed on Friday with landfall expected on its west-central coast on Saturday evening, possibly near hurricane strength, according to the National Hurricane Center.