Average summer temperatures have increased steadily over the last several decades. Summer temperatures in Reno, Nevada have risen 10.9 degrees Fahrenheit, on average, since 1970, making it the fastest warming city in the nation during the hottest months. The western USA has warmed faster than the rest of the country, on average, but all areas have experienced this warming. While these climatic shifts are occurring year-round nationwide — in fact, in many areas, it’s getting warmer faster during other seasons — the summer is often when the effects cascade. The temperatures are higher, so any increase may be felt even more strongly. And people are more likely to spend extended time outside, exposed to the elements.
https://www.msn.com/en-us/weather/topstories/summer-in-america-is-becoming-hotter-longer-and-more-dangerous/ar-AAZ7b9t