The response to the devastating earthquake produced the highest amount of mobile donations "that we have ever seen," said Jenifer Snyder, the executive director of mGive Foundation, the nonprofit group that is working with the Red Cross and wireless carriers to channel the donations.
To donate to the Red Cross, mobile users are texting the word "Haiti" to the number 90999. Ms. Snyder said the money is coming in at a rate of roughly $200,000 an hour. As of Thursday afternoon, people had donated $5.1 million.
"We could be handling more," she said. "We are not at capacity."
Red Cross spokesman Roger Lao called the outpouring of $10 donations by hundreds of thousands of mobile users "nothing short of awe-inspiring." But he said the largest donations the organization is getting are still coming in online.
So far, the Red Cross has released $10 million for earthquake relief in Haiti.
On Thursday morning's The Early Show on CBS, Secretary of State Hillary Rodham Clinton asked Americans to contribute to the Red Cross via text donations. And on social networks Twitter and Facebook, users continued to urge one another to text money as well.