Tuesday, July 4, was the hottest day ever recorded, with the average global temperature reaching 62.92 degrees Fahrenheit, according to data from the U.S. National Centers for Environmental Prediction. The previous record of 62.62 degrees was reached one day earlier, Monday, as heat waves scorch multiple regions across the globe. Here in the U.S., millions of people have been under excessive heat warnings in the south and west of the country. Meanwhile, wildfire smoke from Canada continues to plague large sections of the U.S. Wildfires are also burning in Colorado and Washington state.