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It’s one of the biggest fundraisers in Facebook history. In 11 days, more than 525,000 Americans have given over $20 million to help asylum-seekers and migrants at the border. And after President Donald Trump criticized the comedian as “whimpering,” Jimmy Fallon told his 51.2 million Twitter followers he was making a donation in the president’s name.

The donations will go to the Refugee and Immigrant Center for Education and Legal Services, or RAICES, an immigration legal services nonprofit helping immigrants, refugees, and children in Texas. The money, nearly triple the organization’s previous annual budget, will enable the center to hire more personnel to handle the thousands of immigrant families being separated at the border by the Trump administration. The nonprofit will also hire trainers to organize the many citizens who want to volunteer.

Still, those donations may not be enough, Money reports.

“We’re actually up against the federal government,” Jenny Hixon, RAICES’s development director told the magazine. “They obviously have well more than $20 million to both detain and prosecute these folks. We really want to make sure that we’re able to represent everybody who needs representation.”

RAICES is just one of many organizations that are working to help immigrants at the border. If you’re looking to get more involved, here are several organizations that could use your support.

From the Texas Tribune (full list here):

From Slate, (see full list):

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