Extreme weather is contributing to undocumented migration and return between Mexico and the United States, suggesting that more migrants could risk their lives crossing the border as climate change fuels droughts,

Extreme weather is contributing to undocumented migration and return between Mexico and the United States, suggesting that more migrants could risk their lives crossing the border as climate change fuels droughts,

A new study found that people from agricultural areas in Mexico were more likely to cross the border illegally after droughts.

Extreme weather is a factor in driving both illegal border crossings from Mexico into the U.S. and whether migrants return to Mexico, according to new research published in the Proceedings of the National Academy of Sciences (PNAS).