This is great work and you are to be commended, but I'm not quite sure what to make of the data... I live in a part of the USA that has been above 100F for the past week and will be again over the next few days (we got a brief respite overnight and today). When I look at the national average of the US in your tool though... it would actually be a slight improvement over my area if those were the averages. As I scanned through a couple countries at random, there were several where I thought "gee, that wouldn't be terrible." So, I don't know if sub-country data is available, but it might make it a bit more real, at least for countries that span large geographic areas.