President Joe Biden's administration is now granting two years of humanitarian parole to people fleeing war in Ukraine.
Under the program, which took effect last week, Ukrainians need sponsors in the United States to take them in.
Anyone legally in the country can host Ukrainians in their house, as long as they show they have the means or resources to help.
The rule is the same for U.S. citizens, legal permanent residents, or holders of Green cards.
On Sunday at 9 p.m., the United For Ukraine program (U4U) went into effect, which grants two years of humanitarian stay but prohibits Ukrainians from seeking asylum at the border.
There were about 18,000 Ukrainians that managed to cross the border from Tijuana to San Diego between March 14 and April 24. From Monday, Ukrainians must request refuge from wherever they are through the U4U mobile application.
The program also has a portal, Welcome.US, where interested parties can sign up as sponsors to host Ukrainian refugees. https://ukraine.welcome.us/
The portal also has options to help refugees as volunteers and in particular tasks.
More than five million Ukrainians had to leave their country, and at least ten million have been displaced by the war, according to the United Nations High Commissioner for Refugees (Acnur).