The content originally appeared on: CNN Tokyo (CNN)Japan is asking some 37 million people living in and around Tokyo to use less electricity and ration air conditioning even amid a record heat wave that has seen temperatures in some parts of the country pass 40 degrees Celsius (104 degrees Fahrenheit). The government urged citizens in the capital to turn off lights and power switches for three hours in the afternoon and to use air conditioning 'appropriately,' as the country struggles […]