US authorities remain on tenterhooks about what may happen when Title 42 ceases to apply this midnight. Republican opposition predicts that more than a million people will try to cross the border in the next three months.

Local authorities in areas bordering Mexico warn that daily flows of migrants to the United States have already increased, already standing at 10,000 people a day. The Secretary of Homeland Security, Alejandro Mayorkas, insists that irregular migrants who do not meet the asylum requirements will be expelled in a matter of "weeks or days"