PHOENIX (AP) Phoenix sizzled through its 31st consecutive day of at least 110 degrees Fahrenheit (43.3 Celsius) and other parts of the country grappled Sunday with record temperatures after a week that saw significant portions of the U.S. population subject to extreme heat.

The National Weather Service said Phoenix climbed to a high of 111 F (43.8 Celsius) before the day was through.

July has been so steamy thus far that scientists calculate it will be the hottest month ever recorded and likely the warmest human civilization has seen. The World Meteorological Organization and the European Unions Copernicus Climate Change Service on Thursday proclaimed July beyond record-smashing.

The historic heat began blasting the lower Southwest U.S. in late June, stretching from Texas across New Mexico and Arizona and into Californias desert.