If you didn't know, it is hot in North America right now. Really hot. Like melting-cables hot. The Pacific Northwest and Canada have been the hottest they have ever been. Cities that are used to summer temperatures reaching close to 90°F (32°C) are feeling temperatures over 110°F (43°C). It is all part of the changing climate on our planet, and although it isn't the hottest temperatures ever recorded on Earth, this heat is covering a remarkable swath of the planet.