House Democrats are set to introduce the first major piece of legislation to establish protections for migrants displaced by climate change, ramping up a push for a long-overdue framework for how the United States should respond to a crisis already unfolding on its shores.

The bill, called the Climate Displaced Persons Act, would create a federal program separate from the existing refugee program to take in a minimum of 50,000 climate migrants starting next year.

The legislation, a copy of which HuffPost obtained, directs the White House to collect data on people displaced by extreme weather, drought and sea level rise and submit an annual report to Congress. It also requires the State Department to work with other federal agencies to create a Global Climate Resilience Strategy that puts global warming at the center of U.S. foreign policy.

The bill, set to be introduced by Rep. Nydia Velázquez (D-N.Y.), is a companion to legislation proposed by Sen. Ed Markey (D-Mass.), one of the leading advocates for a Green New Deal. Its introduction in the House of Representatives marks an escalation as Democrats start to flesh out what a sweeping federal plan to eliminate emissions and prepare the country for more climate catastrophe would look like.

The 21-page proposal looks unlikely to become law while Donald Trump, who rejects climate science and slashed the country’s refugee cap to a historic low of 18,000 last month, remains president.

But the bill lays the groundwork for how a future administration could deal with what’s already forecast to be among the greatest upheavals global warming will cause.

Since 2008, catastrophic weather has displaced an average of 24 million people per year, according to data from the Swiss-based nonprofit Internal Displacement Monitoring Centre. That number could climb to anywhere from 140 million to 300 million to 1 billion by 2050. The World Bank estimated last year that climate change effects in just three regions ― sub-Saharan Africa, South Asia and Latin America ― could force 143 million people to flee by the middle of the century.