Japan’s government has urged people in Tokyo and its surrounding area to use less electricity on Monday, as it warned that supplies will be strained as the country faces a heatwave.  The Ministry of Economy, Trade and Industry expects demand for power to be “severe” this afternoon local time. It said people should switch off unnecessary lights but still use air conditioning to avoid heatstroke. For weeks, officials have warned of a power crunch as temperatures rise. Over the weekend, the temperature in central Tokyo rose above 35C, while the city of Isesaki, northwest of the capital, saw a record 40.2C. That was the highest temperature ever recorded in June for Japan. June marks the start of summer in Japan, with temperatures typically staying below 30C during the month. In a statement on Sunday, the ministry said that excess generating capacity for electricity was expected to drop to 3.7% on Monday afternoon in Tokyo and eight surrounding prefectures. It views a buffer of 3% as necessary for stable power supply.(BBC)…[+]