This map shows the average number of days per year locations can expect to exceed 100°F by the end of this century, if greenhouse gas emissions continue increasing. In this potential future, parts of Texas that experienced 10 to 20 days of 100°F weather per year in recent decades may experience more than 100 days over 100° by the end of the century.
Image Credit: U.S. Global Change Research Program. This map and many others can be found in the report Global Climate Change Impacts in the United States (2009), a national assessment conducted by experts from 13 U.S. government science agencies, universities, and research institutes.