MELBOURNE, AUSTRALIA - JANUARY 27: Two girls enjoy a swim at St Kilda beach as a heatwave hits Melbourne on January 27, 2009 in Melbourne, Australia. The temperature today is estimated to hit 38 degrees celsius or around 100 degrees fahrenheit, with today being the coolest day forecast until next week. Melbourne hasn't had four consecutive days above 40 degrees celsius or 104 degrees fahrenheit since 1908. (Photo by Scott Barbour/Getty Images)