"Climate of Adelaide Article" Stolen from Wikipedia (Read the part I bolded)
On the 26 January 2009, another ongoing heatwave struck the city due to a virtually stand still high pressure system that is dragging northerly air streams towards the city. The heatwave is breaking numerous records and occurred at the same time Melbourne, another southern Australian city, sweltered through a record breaking heatwave of it's own, wreaking havoc on that current year's Australian Open. The heatwave commenced on Australia Day 2008 with temperatures above 35 degrees. From 27 January onward the temperature has soared above 40 degrees for 3 consecutive days with another 3 days planned and no temperatures below 40 until at least 2nd February where the temperature is expected to reach 39 degrees celcius.
This would be the longest straight run of 40 degrees plus temperatures in Australian history.
On 28 January, the third day into the heatwave, the temperature soared to 45.7 degrees celcius, making it the 3rd hottest day on record in Adelaide. On that same night, the temperature only dipped to 33.9 degrees celcius making it the highest minimum temperature on South Australian record.
Although relief is in sight over the western part of South Australia, Adelaide is expected to continue to swelter in 38 degrees plus temperatures until at least February 5 although minimum temperatures are expected to drop to a more comfortable 22 degrees. The heatwave is expected to equal or even break any record made in the 2008 heatwave.
As of Thursday 29 January 2009, the heatwave is still ongoing in it's fourth day.