"Extreme heat and extreme cold both kill hundreds of people each year in the U.S., but determining a death toll for each is a process subject to large errors. In fact, two major U.S. government agencies that track heat and cold deaths--NOAA and the CDC--differ sharply in their answer to the question of which is the bigger killer. One reasonable take on the literature is that extreme heat and extreme cold are both likely responsible for at least 1300 deaths per year in the U.S. In cities containing 1/3 of the U.S. population, a warming climate is expected to increase the number of extreme temperature deaths by 3900 – 9300 per year by 2090, at a cost of $60 - $140 billion per year. However, acclimatization or other adaptation efforts, such as increased use of air conditioning, may cut these numbers by more than one-half."

**(The National Weather Service is an agency of the United States federal government that is tasked with providing weather forecasts, warnings of hazardous weather, and other weather-related products to organizations and the public for the purposes of protection, safety, and general information.)