President Barack Obama is hoping to get another $2bn from Congress to deal with the flood of immigrants crossing illegally into the US from Mexico.
The president is also asking for new powers to return immigrant children apprehended while travelling without their parents.
More than 52,000 unaccompanied youngsters, mostly from Central America, have made their way into the US since last October, a situation Mr Obama has called an “urgent humanitarian situation”.
Overall, more than 174,000 immigrants, mostly from Honduras, El Salvador and Guatemala, have been arrested in Texas this year.
A White House official said that Mr Obama plans to make the requests of Congress in a letter to be sent on Monday.
The official said that members of Congress will deal with the details of the emergency request after they return from their holiday recess on July 7.
The president will ask for the Homeland Security Department to be granted the authority to “fast track” the screening and deportation of all immigrant children travelling without their parents.
The number of youngsters crossing the border has almost doubled since 2012 and has increased massively since 2009 when border agents apprehended just 3,300 children.
The Obama administration says the youngsters are fleeing poverty and violence, but critics say the president’;s immigration policies are also to blame.
Planned immigration reform, which had been on the agenda for Congress, suffered a setback after some Republican supporters were deselected to run in the next election.
Vice-President Joe Biden visited Guatemala where he requested parents not to send their children north to the US.Many immigrants cross the Rio Grande to enter the US illegally
Republican House Speaker John Boehner has urged Mr Obama to send National Guard troops to the southern border to help deal with the surge.
Most of the youngsters have been crossing from Mexico over the Rio Grande Valley into Texas, often guided by human-smugglers.
The US Department of Homeland Security last month began flying the immigrants to Arizona from overflowing facilities in Texas.
Sites in Virginia, California and Oklahoma have since been earmarked to accommodate the hordes.
Anecdotal evidence suggests that some of the undocumented children arriving in the US believed they would be allowed to stay if they made it to American soil.
US law prohibits the immediate deportation of unaccompanied children if they are not from Canada or Mexico.