Warm

It gets ridiculously hot where I live. It's been fairly pleasant lately but that'll change when summer comes.The hottest day on record in my city was a few years back now but I remember it well. It was a fairly dry heat but back then we didn't have any air conditioning in the house, so boy did we suffer!I'm not sure of the exact measurement but I remember the news reporting that it had reached something on the order of 48 or 49° Celsius. For the Americans, that's about 120° Fahrenheit.Actually, I saw something strange that day and it's never occurred to me to ask about it here.Under the house (the "garage" I suppose; the car, piles of junk, etc) that day, we found the largest congregation of flies I've ever seen. And I'm not kidding; I didn't know there were that many flies in Australia!They were like a blanket. They covered everything so thickly you couldn't see a surface anywhere. They were pressed wing-to-wing and if you put your hand down anywhere, they exploded into a thick cloud in all directions. I've honestly never seen anything like it.So as obvious as the answer may seem, I just want to clear it up; why? Do flies just seek shade in extreme heat? It seems obvious but the reason I ask is because we've had hot days before (not as hot as that one, but close) and I'd never seen anything like that. Never seen it since, either.

Townsville, about 1500 km north of Brisbane and 400 km south of Cairns.