A study of deaths in the Central Valley during a record heat wave shows many of the deaths were preventable. Two-thirds of the 36 fatalities were people 65 or older. Twice as many men as women died. Only one was a field worker. Several victims were so frugal or impoverished that they broiled rather than run their air conditioners. Many were elderly people who lived alone, and several were shut-ins who had mental illnesses.