China is facing unprecedented strain on its power grid, as record-breaking heatwaves across much of the country pushed electricity demand to a new high of over 1.5 billion kilowatts on Wednesday, according to energy officials.

A massive arc of high temperatures--fueled by a subtropical high-pressure system--is affecting an area home to over 200 million people, stretching from Chongqing in the southwest to Guangzhou on the southern coast. Authorities report record temperatures at multiple weather stations across northwest and southwest China.

In June, solar energy accounted for about half of the power generation surge. While hydropower output increased compared to 2023, it remains below 2022 levels. The National Energy Administration flagged a "record high" in electrical load for the third time this month, with an increase of 55 million kilowatts over last year's peak.

Provincial records have been shattered 36 times this summer. In Hubei and Hunan--provinces roughly the size of Italy and Britain, respectively--apparent temperatures are forecast to hit up to 50°C (122°F). Similar extremes are expected in Jiangxi and Guangdong, home to populations the size of Spain and Mexico.

The extreme heat is also impacting agriculture, manufacturing, ports, and healthcare, while simultaneously boosting consumer spending. Sales of air conditioners and fans have surged by 112% and 103%, respectively, according to JD.com. The services sector--from cinemas to catering--is seeing increased demand as people seek relief indoors.

This heatwave coincides with China's "Sanfu Season", which runs this year from July 20 to August 19. Over the past decade, provinces like Jiangxi have seen a significant rise in the number of high-temperature days, signaling a shift in regional climate patterns.

While a tropical depression near the Philippines--possibly developing into Tropical Storm Wipha--may bring temporary relief, it could be stalled by the subtropical high, keeping air conditioning units in overdrive and grid stability under pressure.

Source: The Watchers