20°C "heatwave" - how very dare you! I'll have you know it was 28°C here yesterday, I was supposed to be playing cricket at high noon but we all decided it was too hot so sheltered in the clubhouse to watch the football (and partake in a few beverages).
When we emereged and started a T20 game at 4pm the beverages made the batting, bowling and umpiring very interesting.
FYI the cricket we play over here has some very good natured sledging and very little use of sandpaper ;-)