Updated at 4:32 p.m. ET
Barry reached Louisiana's central coast, near Intracoastal City, on Saturday morning as a Category 1 hurricane, the National Hurricane Center said, before weakening to a tropical storm.
The storm has already brought flooding to New Orleans, where tornado warnings have been issued.
Residents across other parts of Louisiana have also been bracing for flooding — forecasters predict up to 25 inches of rain across much of southern Louisiana and southwest Mississippi, leading to dangerous, life threatening flooding.