What happens to the human body in 49C heat? Australians are finding out

Doctors warn there are biological limits to temperatures we can survive, and exposure to extreme heat can provoke a heart attackFollow our Australia news live blog for latest updatesGet our breaking news email, free app or daily news podcastAustralias southern states are scorching in extreme heat that could break temperature records in Victoria and South Australia on Tuesday.January and all-time records were forecast to be set in both states, with temperatures approaching 50C across inland areas...