Beyonce also released a statement on Monday to The Houston Chronicle, saying, "My heart goes out to my hometown, Houston, and I remain in constant prayer for those affected and for the rescuers who have been so courageous and determined to do so much to help".
Although the Kardashians were not tagged in Hart's original post, Kris Jenner and her daughters answered his plea within a day, adding how she and her family were so moved by the "heartbreaking footage" of the flood victims.
"I know what you're going through". She told the Houston Chronicle in a statement on Monday that she was lending a hand, but didn't specify a dollar amount.
"My sisters, mom and I accept your challenge Kev!" I'm challenging a lot of my celebrity friends to follow my lead and donating $25,000 to Hurricane Harvey to the Red Cross.
They are among several stars who've said publicly they are helping hurricane victims. "Help me help Houston", he wrote.
Kim Kardashian West and her famous siblings announced Tuesday they would give $500,000 to help Harvey victims. This is a serious matter. I think that people are in bad shape and they need help.
"My heart goes out to my hometown, Houston, and I remain in constant prayer for those affected and for the rescuers who have been so fearless and determined to do so much to help".
The Rock also asked the public to spare "a buck or two to help our Houston families in need".
DJ Khaled and Nicki Minaj joined in with $US25,000 donations.
The Rock announced that he donated $25,000 to the Red Cross and then went on to send a message to Houston.