Summer up here usually lasts five or six days. :D But I'm afraid your definition of "heatwave" and suitable clothing is more than a little askew. Take our local school bus driver. His bus pulled up in mid-February and he was wearing shorts, a short-sleeved shirt, socks and sandals. I said isn't it a bit cold for that? He gave me a puzzled look and said "but the temperature's up a bit today". Yes, the temperature had risen to 1C. I dread to think what he'll be wearing today when it's already hitting a heady 18C at 8.30am...