The 25-year-old Ruth Chepngetich won the global, marathon title in her first World Championships appearance in extreme heat and humidity in Qatar's capital city Doha.
The race kicked off at midnight on Friday to avoid extreme heat, but the air temperature was still above 30C with 70% humidity. Almost 30 runners were forced to quit due to extreme weather including all three Ethiopian runners who were real medal contenders.
"We never would have run a marathon in these conditions in our own country," Ethiopia's marathon coach Haji Adillo Roba told AFP.
The 23-year-old Chepngetich won the race in two hours 32 minutes and 43 seconds. Defending World champion Bahrain's 39-year-old Ruth Chelimo took silver in 2:33.46 as Commonwealth champion Helalia Johannes of Namibia, also 39, concluded the podium with 2:34.15.