'Hell on earth': Phoenix's extreme heatwave tests the limits of survival

Residents of Arizona's capital are used to scorching heat, but the summer's unyielding sizzle is making harder to live thereIt's Wednesday morning in Phoenix and even under thick clouds, the thermometer is hovering above 100F (37.7C).Arizona's capital city is nicknamed "Valley of the Sun", and residents are used to scorching heat. But by day 12 of a vicious heatwave that's sent temperatures soaring into triple digits, with little relief overnight, limits are being tested - and it's only going to get hotter. Continue reading...