Sydney's Sweltering Summer in Spring: What Fire Bans Reveal About Our Climate Future A total fire ban has been issued for Sydney as the city prepares to reach a scorching 33 degrees, five days into autumn.
Normally, temperatures this high are not expected until mid summer. The Bureau of Meteorology warns that very dry and windy conditions will increase the risk of fire.
Wind gusts can reach up to 70km an hour, while humidity levels plummet to just 20%. In Penrith, average maximum temperatures for September usually hover around 23.