In 2011, cities including Houston, Dallas, Austin, Oklahoma City, and Wichita, among others, all set records for the highest number of days recording temperatures of 100°F or higher in those cities’ recorded history. The black circles denote the location of observing stations recording 100°F days. (Figure source: NOAA NCDC 20126c80afef-61e7-4017-b926-f4a11f6faa2d).