The U.S. authorities intercepted more than 171,000 migrants at the border with Mexico in March. This is the highest monthly figure in at least fifteen years, reports The Washington Post.
It shows the increasing humanitarian challenge facing President Joe Biden. The migrants included about 19,000 unaccompanied children and 53,000 family members travelling together, preliminary figures show.
In addition, it concerned about 99,000 single adults.
Among other things, the Biden government is struggling to find housing for unaccompanied children who are trapped for days in overcrowded border stations and registration centres. The shelter system for housing the children are overloaded.
The U.S. government has set up emergency shelters in recent weeks, including in convention centres in Dallas and San Diego.