Houston Rockets owner Leslie Alexander donated $4 million to the Hurricane Harvey Relief Fund started by Houston Mayor Sylvester Turner, the team announced.
"Our hearts are heavy seeing the devastation that so many of our friends, family and neighbors are experiencing," the Rockets said in a statement.
The Houston Astros ownership group also agreed to donate $4 million to the relief efforts.
The donations were among several pledged by teams and athletes to aid victims of flooding in Houston, including a $50,000 pledge by Rockets point guard Chris Paul toTexans defensive end J.J. Watt's online fundraiser.
Paul's donation pushed the total raised by the fundraiser to $500,000. The total raised had increased to $1 million by Monday night, prompting Watt to raise the fundraiser's goal to $1.5 million.
Now classified as a tropical storm, Harvey has devastated the Houston area with flooding as a result of unprecedented rainfall totals.
Among other donations announced:
The Associated Press contributed to this report.