As devastating heat waves sweep swaths of the globe, farmers in Canada are facing a crippling phenomenon: Crops are baking in fields. Cherries have roasted on trees. Fields of canola and wheat have withered brown. And as feed and safe water for animals grow scarce, ranchers may have no choice but to sell off their livestock. “It will totally upend Canadian food production if this becomes a regular thing,” said Lenore Newman, director of the Food and Agriculture Institute at the University of the Fraser Valley in British Columbia.