Watt’s crowd-sourced fundraiser had initially appealed for US$100,000 to help victims of the disaster but ended up becoming one of the most successful appeals of all time.

In a statement on Monday to mark the one-year anniversary of the fund’s launch, Watt said the relief effort following Harvey had served as an inspiration.

“As I reflect on the events of Hurricane Harvey one year ago, the memories of destruction and devastation remain, but they are accompanied by memories of hope, selflessness and the beauty of the human spirit,” Watt said.

“The actions of professional first responders and everyday citizens alike were an inspiration to the world and a shining example of the inherent good that lies within us all.”

Watt provided details of how the millions raised through his appeal had helped to rebuild areas affected by the devastating flooding.

More than 600 homes had been repaired and rebuilt with money from the fund, which also helped over 420 childcare centres for 16,000 children get up and running.

The fund also helped pay for 26 million meals while covering the cost of physical and mental health services for around 6,500 people.

Watt, a 29-year-old defensive end, is one of the NFL’s biggest stars, winning the Defensive Player of the Year award three times in his first five seasons after joining the Texans in 2011.

He is the only player in history to have scored more than 20 sacks in two separate seasons.