As I wrote in Taki’s Magazine in September:
I’m not in the business of making specific forecasts, but let me offer a general concern: There are currently 418 million people in South America, and the U.N. says there will be 510 million by midcentury. What are the odds that at some point something will go wrong in Latin America that interested parties in the U.S. will try to define as justifying our own Camp of the Saints? Last year, the Obama administration tried to pass off Central American gang violence as justification for letting in unaccompanied youths. Next year, it could be an earthquake, hurricane, civil strife, recession, inflation, sexism, homophobia, or transgender insensitivity.The immigration / refugee program is already in place. From Wikipedia:
Temporary protected status (also called “TPS”) is a temporary immigration status to the United States, granted to eligible nationals of designated countries.Anchor babies are American citizens, of course.
In 1990, as part of the Immigration Act of 1990 (“IMMACT”), P.L. 101-649, Congress established a procedure by which the Attorney General may provide TPS to immigrants in the United States who are temporarily unable to safely return to their home country because of ongoing armed conflict, an environmental disaster, or other extraordinary and temporary conditions. …
During the period for which a country has been designated for TPS, TPS beneficiaries may remain in the United States and may obtain work authorization.
Countries that are currently under TPS14 years now
El Salvador — initiated in response to the 2001 El Salvador earthquakes
Haiti — initiated in response to the 2010 Haiti earthquakeA mere 5 years
Honduras — initiated in response to Hurricane Mitch in 199817 years ago, but whaddaya whaddaya …
NicaraguaWhat are the odds that the New York Times demand that the Obama Administration put giant Mexico next on the list? What are the odds that the New York Times demand that giant Mexican billionaire Carlos Slim use some of his sketchy fortune to alleviate the suffering of his fellow Mexicans in Mexico?
Syria — as of March 29, 2012, in response to the ongoing Syrian Civil War
Guinea, Liberia, Sierra Leone — as of Nov 21, 2014, in response to the 2014 Ebola outbreak 
Nepal as of June 25, 2015, in response to the conditions resulting from the devastating magnitude 7.8 earthquake that struck Nepal on April 25, 2015, and the subsequent aftershocks
Yemen as of September 3, 2015, in response to ongoing conflict in the area as a result of the Yemeni Civil War.