Hot enough for ya?
For you non-metric types, that 38C is an even 100F. I think I speak for most of my fellow Canadians when I say, “WTF?”
I suppose it’s redundant and unnecessary to add that staying out of the sun, finding a cool, air-conditioned place to hole up in (if possible) and drinking plenty of fluids (alcohol or tea or coffee don’t count in this regard as they tend to dehydrate) is the best way to prevent heat exhaustion or stroke. I really don’t want to see you in my emergency all floppy, syncopal and dehydrated because you’ve decided Thursday is the best day to practice for the triathlon or because you think the lawn needs a little trim before the weekend.