No let-up in Phoenix as extreme temperatures persist

Emergency-room doctor treating heatstroke victims with large amounts of ice as Arizona city enters ninth day of lows above 90F

With no immediate let-up anticipated for the scorching heat over the American south-west - where temperatures have reached more than 110F (43.3C) in the day and not dropped below 90F (32.2C) at night - a Phoenix emergency room doctor has resorted to using children's pools and large zip-bags filled with ice to cool heatstroke victims.

Frank LoVecchio, a Phoenix-area emergency room medical toxicologist, told CBS News that he had treated three or four cases of heatstroke over the past three days using the technique, which involves covering the patient with ice until only their eyes and mouth are showing.