Smugglers funnel migrants toward remote Arizona desert, despite temperatures reaching 118 degrees

Smugglers in Mexico are pushing migrants to enter the United States through the remote Arizona desert. This poses a problem for border control agents in the sweltering Arizona heat.

Suddenly, the Border Patrol’s Tucson Sector, which oversees the area, in July became the busiest sector along the U.S-Mexico border for the first time since 2008. It's seen migrants from faraway countries like Pakistan, China and Mauritania, where social media is drawing young people to the new route to the border that begins in Nicaragua. There are large numbers from Ecuador, Bangladesh and Egypt, as well as more traditional border crossers from Mexico and Central America.

"Right now we are encountering people from all over the world," said Border Patrol Deputy Chief Justin De La Torre, of the Tucson Sector. "It has been a real emergency here, a real trying situation."