They are using cloud seeding in an effort to produce water for thirsty crops and cattle. CBS 'This Morning' Meteorologist Craig Allen reports.
Once they get there, flares are filled with silver iodide and fired into rain-bearing clouds; the rain clouds must already exist.
Water vapor from the clouds condenses to form tiny droplets and merges into larger rain drops that eventually fall to Earth.
The process takes about 20 to 30 minutes to produce rainfall.
Despite the millions of dollars spent on research into cloud seeding, there is little evidence it produces more rain than nature would on its own.
Also, since the clouds can drift, it is hard to tell if the rain will fall where it is needed.