Grist: Heat killed three women who were picking grapes in California last week. This sort of tragedy will become more common as temperatures rise, and it`s no surprise that some of the first casualties are the people forced by their circumstances into the heat.
Temperatures reached 108 degrees up and down California`s San Joaquin Valley, far above the average high temperatures in recent years. California requires employers to provide shade and water to farmworkers, but workers lose money if they spend...