With an excessive heat warning in effect this weekend, Border Patrol agents expect an increase in heat related calls from migrants crossing the desert.
The agency has a specially trained unit called "BORSTAR" that preforms specialized search and rescue operations for migrants and agents.
Border Patrol says their BORSTAR agents are always on high alert but they plan to be more proactive this weekend with temperatures nearing 120 degrees. Border Patrol says those extreme temperatures do not deter smugglers.
In fiscal year 2015, the Tucson sector rescued 790 people. That's up from 509 the year before. In that same time frame, they saw a 40 percent decrease in the number of deaths.