The Texas ranch where Gilda Jackson trains and sells horses has been plagued by grasshoppers this year, a problem that only gets worse when the hatch quickens in times of heat and drought. Irrigation might have saved Jackson's hay, but she and her husband rejected the idea about 10 years ago over the cost: as much as $75,000 for a new well and all the equipment. Many other farmers and ranchers in the U.S. might be forced to do the same in coming decades, according to recent research into the expected effects of the rising heat and more frequent weather extremes associated with climate change.