Persian Gulf Experiences Record (and Life-Threatening) Heat Index

Parts of the Persian Gulf "have seen the heat index, or how it feels when factoring in the humidity, reach 140 to 150 degrees Fahrenheit (60 to 65 Celsius)," reports the Washington Post, "fueled by an intense heat dome, the warmest water temperatures in the world and the influence of human-caused climate change."Temperatures at the Persian Gulf International Airport in Asaluyeh, Iran, climbed to 108 (42 C) on Wednesday and 106 (41 C) on Thursday, with both days recording a peak heat index of 149 (65 C). In Dubai, the temperature topped out at 113 (45 C) on Tuesday and the heat index soared to 144 (62 C). Other extreme heat indexes in recent days include 141 (61 C) in Abu Dhabi and 136 (58 C) at Khasab Air Base in Oman. Last August, this same region experienced even more extreme heat indexes, climbing as high as 158 degrees (70 C). The maximum air temperatures this week - generally between 105 and 115 (41 and 46 C) - have only been somewhat above normal. But the dew points - which are a measure of humidity - have been excessive, climbing well into the 80s (27 to 32 C). In the United States, any dew point over 70 degrees (21 C) is considered uncomfortably humid. It's the very high dew points that have propelled heat indexes up to 30 degrees (16 C) above actual air temperatures. The extreme humidity levels are tied to bathtub-like water temperatures in the Persian Gulf, the warmest in the world. According to National Oceanic and Atmospheric Administration data, sea surface temperatures are as warm as 95 degrees (35 C). Largely because of the high humidity, nighttime minimum temperatures have also remained exceptionally warm, in many cases staying above 85 (29 C). Temperatures in Iranshar, Iran, only dropped to 97 (36 C) on Wednesday night, its hottest July night on record. "Researchers have identified the Persian Gulf among the regions most likely to regularly exceed life-threatening heat thresholds during the next 30 to 50 years," the article adds. And it also cites new heat records reported for the region by weather historian Maximiliano Herrera. "The United Arab Emirates saw a scorching high temperature of 123 while Adrar, Algeria, tied its record of 122 (50 C). Cities in both Kuwait and Iraq reached 126 (52 C), and Al Ahsa, Saudi Arabia, notched a record of 124 (51 C)... "The same heat dome that's in the Persian Gulf region has spread record heat northward into Eastern Europe, westward into northern Africa, and eastward into India, Pakistan and Indonesia. In Eastern Europe, high temperatures surpassed 104 (40 C), with some locations staying above 85 degrees (29 C) at night."

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