[custom_adv] A city in southwest Iran posted the country’s hottest temperature ever recorded Thursday afternoon, and may have tied the world record for the most extreme high temperature. [custom_adv] Etienne Kapikian, a forecaster at French meteorological agency MeteoFrance, posted to Twitter that the city of Ahvaz soared to “53.7°C” (128.7 degrees Fahrenheit). [custom_adv] The temperature in Ahvaz climbed even higher, hitting 129.2 degrees at both 4:51 and 5 p.m. local time. [custom_adv] If that 129.2 degrees reading is accurate, it would arguably tie the hottest temperature ever measured on Earth in modern times. [custom_adv] Officially, Death Valley set the record for the hottest temperature ever recorded on Earth on July 10, 1913, soaring to 134 degrees (57 Celsius). [custom_adv] For the 129.2 degree-reading Ahvaz posted on Weather Underground to stand and match the highest modern global temperature, it will require review by the World Meteorological Organization. [custom_adv] The scorching temperature reading was brought about by a dome of heat centered over the Middle East. [custom_adv] The excessively hot air over Ahvaz, a city of 1.1 million people, felt even more stifling due to high humidity. As the temperature climbed into the high 120s, the dew point, a measure of humidity, peaked in the low 70s; a high level for the desert location (due to moist air flow from the Persian Gulf, to the south). [custom_adv] In the Persian Gulf city of Jask, Iran, about 800 miles southeast of Ahvaz, the humidity was even more suffocating.