I'm surprised that I've seen so many of these films...
Anyone in Sydney today I sincerely recommend not going outside. I just went down the video store (about 3 minutes walk away) and a minute into the walk my eyes were watering, the insides of my nostrils were sweating and it felt like I was going to collapse. I've lived in hot weather but today with combination of heat and wind - it seems unrelentingly oppressive... (as of the time of writing it is 38.4 degrees).
(Update - stroke of 4pm, gale force cool winds blow the heat away - thank you unnamed deity!)