The actual air temperature was 109 degrees with a dew point temperature of 90, the Washington Post’s Capital Weather Gang reported.
"Bandar Mahshahr sits adjacent to the Persian Gulf in southwest Iran where water temperatures are in the 90s. Such high temperatures lead to some of the most oppressive humidity levels in the world when winds blow off the water," wrote Jason Samenow, of the Post.
— Ryan Maue (@RyanMaue) July 30, 2015
The highest known heat index ever recorded, according to weather historian Christopher Burt, is in the 155-160 degree range.
In his book "Extreme Weather," Burt says Dharhan, Saudi Arabia, also on the Persian Gulf, logged a heat index of around 155-160 degrees on July 8, 2003. Its air temperature was 108 degrees, with a dew point of 95.
— Anthony Sagliani (@anthonywx) July 30, 2015
Iran is not the only country to be subjected to punishing temperatures in the Middle East, where humidity has paired with a suffocating heat wave.
Also on Thursday, Baghdad hit 122 degrees, although the dew point was a lowly 44 considering the desert environment. That combination produced a heat index of 115, the Post reported.