Try to name the cities in the world with a population of over 4 million people that have the coolest or lowest; Hottest Ever or Record High temperature.
Based on population figures from citypopulation.de for urban agglomeration/metro area
Temperature figures are from Wikipedia and are in celsius
Some temps in Fahrenheit: 28.6 celsius is 83.5 fahrenheit; 36.3 C is 96.3 F; and 37.7 C is 99.9 F