Here in the US we are inbetween centigrade and Fahrenheit. Us old folks are mostly on Fahrenheit. So, I pull out the old metric to US converting calculator and see that 40 C is 104 f. We see that here in the US all the time, maybe not everywhere, but some places. Here in Austin Texas, couple years ago, we had something like 38 straight days with over 100° F. Last summer there was maybe 10 to 12 days over 100 F, if that many. High humidity combined with high temps is when it's really bad for karting. What kind of humidity are you seeing with your high temps?Yeh it's hot as hell in Melbourne. Every day this week has been over 40c. crazy thing is they saying it supposed to be 23c tomorrow. I haven't raced in a long while. I'm building engine building equipment and jigs and stuff. So no time or money for racing the moment for me.
Glad I checked on you! So far I have not seen the first snowflake, we are sheltered on the east side of the mountians so unless a storm comes from the SE we don't get anything however Bergfelt has been having a good time playing in snow.