Sweat In The City

Why cities got the worst of the latest heatwave:

Urban areas are almost always warmer than their surrounding suburbs because of the greater amount of asphalt, tall buildings, and lack of green areas. One study of an intense 2008 heat wave in Oklahoma found that Oklahoma City's temperatures were, on average, 1F degree (Fahrenheit) warmer during the day and 4F warmer at night than surrounding areas. That may not seem like a lot, but heat stroke occurs when the body temperature rises to 105F, so the difference between 102F and 106F can be critical.