It was the hottest day of the year so far when the central air conditioning started blowing hot air in the mobile home where Richard Chamblee lived in Bullhead City, Arizona, with his wife, children, and half a dozen cats and dogs.
It was only mid-June but the heat was insufferable, particularly for Chamblee, who was clinically obese and bed-bound in the living room as the temperature hit 115F (46C) in the desert city – situated 100 miles (160km) south of Las Vegas on the banks of the Colorado River.
