The stress of the humanitarian crisis at the border is not only affecting the migrants, but also is impacting the U.S. Border Patrol agents who are increasingly finding themselves dealing with situations that are completely new to them.

In the midst of a migrant crisis on the southern U.S. border, the White House is withholding funding to the region, potentially undermining its efforts to stop the exodos from Central America, critics say.

Scores of Central American migrants have arrived at the border between Mexico and the United States. Many of them are fleeing their home countries to escape gang violence and extortion, but they have found themselves in Mexican border cities like Tijuana, where violence is just as prevalent as back home.

Many of the Central American migrants coming to the United States are from Honduras, where more than 60 percent of the population lives in poverty, and a political crisis has deeply polarized the country over the re-election last year of President Juan Orlando Hernandez.

As part of Univision’s week-long series looking at the border crisis, Valeria Leon reports on the journey for the mostly Central American migrants who have joined the caravans heading to the United States. It's a challenging trip for anyone, much more so for single mothers who decide to make the trek with their children.

In Mexico City, the government is implementing stricter measures to deal with the flow of migrants coming into the country from Central America. Many of these policies took effect after the arrival of the last caravan and could offer a preview of Mexico's new attitude towards migrants passing through the country.