Country star Taylor Swift has pledged $500,000 (£340,750) to the flood relief effort in Nashville, Tennessee.
Record weekend storms killed 20 people in Tennessee as well as six in Mississippi and four in Kentucky.
The money will go directly to flood relief organisations in Nashville, where thousands of homes were damaged.
Swift, who moved to Nashville at the age of 14, said she "could not believe what was happening to the city and the people I love so dearly".
"Nashville is my home and the reason why I get to do what I love," she told the AP news agency.
"I have always been proud to be a Nashvillian but especially now, seeing the love that runs through this city when there are people in crisis."
Meanwhile, The Country Music Association has said it will donate half of the profits from this summer's CMA Music Festival to flood relief.
The festival takes place in Nashville from 10 June to 13 June.