This isn't heat, it's just warm. When I was last living in Oz, it got as high as 43 degrees but the main problem was the gale force wind that came with it, the only thing I can compare it to is like having a hair dryer on the fast setting blowing directly in your face, that's why they have so many bush fires over there.
As for humidity, try living in Malaysia during the monsoon season, now that is something else.