Tokyo Asked to Cut Electricity Use for Third Day

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Tokyo Asked to Cut Electricity Use for Third Day

Bloomberg businesses and homes in Tokyo were asked to curb electricity use for a third day as a heat wave is set to reach its zenith for now, leading power margins to razor-thin levels.

The power-reserve ratios, which measure spare electricity capacity, improved after the country s grid coordinator ordered regional utilities to supply Tokyo. According to the grid coordinator, the ratio will still be below the 3% level considered the minimum for a stable grid at 5 p.m. local time.

There are scorching temperatures hitting parts of the northern Kanto region that surrounds the metropolis, with blazing heat in prefectures that fall under Tokyo Electric Power Co. s coverage, which puts pressure on the network as cooling demand rises. The southern Gunma prefecture is expected to reach 40 degrees Celsius 104 Fahrenheit on Wednesday, according to the meteorological agency.

Tokyo is experiencing the most severe heatwave for June in records dating back to 1875, according to the Japan Weather Association. The forecaster said the temperatures would peak at 36 Celsius on Thursday, which would be the highest this year, before dipping slightly later in the two-week forecast period.

The city has avoided blackouts for the past two days, as residents and industries responded to calls to curb power consumption, and after the nation s grid manager ordered other regions to share supply.

The supply of electricity is expected to be very tight this summer, so residents may have to get used to hearing constant calls for electricity conservation. Jera Co., the country's top power producer, has pushed back the restart of a generation unit one day to Thursday because of maintenance delays.

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