As many as 50,000 migrants are waiting in Mexican shelters for a chance to cross the border, hoping to run out the clock on Title 42, the COVID-era rule limiting entry to the U.S., according to internal documents reviewed by Axios.

Why it matters: That’s double the estimate from back in March, when Axios first reported on the government’s preparations for a “mass migration event.”

The administration’s internal data now counts about 8,000 people attempting to cross the southwest border each day — an enormous number.

It reflects growing numbers of migrants from Cuba, Colombia, Haiti and Peru as well as traditional centers of Guatemala, Honduras, El Salvador and Mexico.