China's scorching heat poses summer test for electricity grid
That'll pile pressure on electricity supplies as people crank up their air conditioners, demand for which has nearly doubled in the past decade.
Swathes of eastern China, home to major population centers including Shanghai, Nanjing and Hangzhou, will see temperatures around 35 C to 39 C (95 F to 102 F), with some places touching 40 C, according to a forecast from the China Meteorological Administration. The region may face a "long-lasting high temperature war,' the state weather bureau said last week.
Key rice growing areas will also bake in the heat, threatening to damage the crop during a crucial development stage and risking lower output in one of the country's top-producing regions.
As the mercury climbs, government officials will be feeling the heat in more ways than one: they must ensure stable power supplies even as demand spikes — potentially to record levels. The National Energy Administration expects peak electricity demand to be about 100 gigawatts higher this summer than last, the equivalent of needing to turn on all the power plants in the U.K. at once.
Preparations have been years in the making. After major blackouts struck China earlier this decade, the authorities built up a massive surplus of coal, the country's mainstay fuel, amply supported by a world-beating roll-out of wind and solar power.
There are already indications that authorities are gearing up for a sweltering few days. Last week, the National Development and Reform Commission, the country's top economic planning agency, took pains to emphasize the electricity grid's readiness for soaring temperatures.
While the network is in better shape to take on peak summer demand this year, "extreme and continuous high temperatures' can tighten power supplies, said an NDRC spokesperson, who also warned that extreme events like typhoons and floods can amplify threats to the grid.
Rains may bring some relief, although heavy downpours — especially in the southwest, where the ground is already saturated after recent drenching — could threaten inundations. A broad band of precipitation is predicted to move through southwest, north and northeast China this week. In Beijing, cooling, thundery rains are forecast in the first half of the week, although the humidity could make it feel hotter than the thermostat suggests.
For now, there is disagreement between major weather models on how long China's heat wave will last. Among those keeping a close watch will be coal traders: the benchmark price for thermal coal crept up from multi-year lows last week due to the sweltering conditions.
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Intense heatwave continues in much of Japan
Japan's weather bureau says much of the country experienced scorching temperatures on Saturday, with temperatures rising above 35 degrees Celsius in places. The Meteorological Agency says the hot weather was caused by a high pressure system which is covering mainly western Japan. Temperatures reached 37.5 in Toyota in Aichi Prefecture, 36.1 in Kyoto City, and 35.4 in Kofu, Yamanashi Prefecture. The heatwave will continue into Sunday. The daytime high is forecast to be 37 in Nagoya in Aichi Prefecture and Kofu, 36 in Takamatsu, Kagawa Prefecture, Kyoto City and Maebashi in Gunma Prefecture, and 35 in the cities of Fukuoka, Hiroshima and Saitama. The mercury is likely to climb to 34 degrees in central Tokyo, Osaka City, Yamagata City and Kitami in Hokkaido. A heatstroke alert has been issued for the following prefectures: Tokyo excluding the Izu and Ogasawara Islands, Chiba, Yamanashi, Mie, Wakayama, Hiroshima, Shimane, Tokushima, Kagawa, and Kagoshima excluding the Amami region. Weather officials say temperatures will remain high in northern Japan until Tuesday or Wednesday, and in western Japan until next Saturday. People are advised to use air conditioners, take liquids and salt and rest frequently when working outside.
Japan Times
a day ago
- Japan Times
China's scorching heat poses summer test for electricity grid
A sizzling start to July is on the cards for China, where nationwide temperatures are poised to climb almost 3 degrees C above historical averages in the first week of the month. That'll pile pressure on electricity supplies as people crank up their air conditioners, demand for which has nearly doubled in the past decade. Swathes of eastern China, home to major population centers including Shanghai, Nanjing and Hangzhou, will see temperatures around 35 C to 39 C (95 F to 102 F), with some places touching 40 C, according to a forecast from the China Meteorological Administration. The region may face a "long-lasting high temperature war,' the state weather bureau said last week. Key rice growing areas will also bake in the heat, threatening to damage the crop during a crucial development stage and risking lower output in one of the country's top-producing regions. As the mercury climbs, government officials will be feeling the heat in more ways than one: they must ensure stable power supplies even as demand spikes — potentially to record levels. The National Energy Administration expects peak electricity demand to be about 100 gigawatts higher this summer than last, the equivalent of needing to turn on all the power plants in the U.K. at once. Preparations have been years in the making. After major blackouts struck China earlier this decade, the authorities built up a massive surplus of coal, the country's mainstay fuel, amply supported by a world-beating roll-out of wind and solar power. There are already indications that authorities are gearing up for a sweltering few days. Last week, the National Development and Reform Commission, the country's top economic planning agency, took pains to emphasize the electricity grid's readiness for soaring temperatures. While the network is in better shape to take on peak summer demand this year, "extreme and continuous high temperatures' can tighten power supplies, said an NDRC spokesperson, who also warned that extreme events like typhoons and floods can amplify threats to the grid. Rains may bring some relief, although heavy downpours — especially in the southwest, where the ground is already saturated after recent drenching — could threaten inundations. A broad band of precipitation is predicted to move through southwest, north and northeast China this week. In Beijing, cooling, thundery rains are forecast in the first half of the week, although the humidity could make it feel hotter than the thermostat suggests. For now, there is disagreement between major weather models on how long China's heat wave will last. Among those keeping a close watch will be coal traders: the benchmark price for thermal coal crept up from multi-year lows last week due to the sweltering conditions.
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a day ago
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How much does a heat wave cost? Insurers and CEOs want to know.
When a hurricane or a wildfire strikes, the economic damage is usually very visible — roofs are ripped off or charred homes line roads. Heat waves cause financial damage, too, but it's more diffuse: Farm crops might wither, construction workers pause or data centers sputter out, forcing customers offline. Climate risk models, which are widely used in the insurance industry, can estimate the likelihood that fires or floods will affect a specific place in the U.S., even down to the address level, and how much damage that would wreak. So far, the models don't typically make detailed projections for extreme heat. For one thing, heat is less of a threat to real estate than it is to health, energy infrastructure and the food supply. But cities, businesses and insurers need the financial risks to be outlined more clearly, and some believe a new market for heat insurance — driven in part by artificial intelligence and the need to cool data centers — is around the corner. Hedging against heat The property information firm Cotality, previously known as CoreLogic, recently started offering heat-hazard modeling on its widely used risk-analysis platform. And Mercer, a unit of Marsh & McLennan Cos, in May launched a climate health cost forecaster tool evaluating how extreme heat and other risks could impact companies' health insurance costs. It draws on historical incidence data, medical claim codes associated with climate events and published research. "The health cost is but one of many,' said Tracy Watts, Mercer's U.S. leader for healthcare policy. "You've got increased workers' compensation cost, disability issues, life insurance, absentee issues.' These newer tools follow the emergence of hedging instruments like weather derivatives, forward contracts and parametric insurance. Using a forward contract, for example, a utility might agree to buy extra electricity from a producer at a certain price for the summer. If temperatures stay low, they lose; if they soar, they win. Parametric insurance pays out only if predetermined physical criteria are reached — say, temperatures above 35 degrees Celsius for five days running. Corn crops that died due to extreme heat and drought during a heat wave in Austin, Texas, on July 11, 2022. | Bloomberg "I think when we look more closely at extreme heat,' said Garrett Bradford, a principal at Milliman, an actuarial and management consulting firm, "we will find the risk often isn't taken sufficiently into account' in insurance, "and the downside of a major heat event is potentially significant.' Last year was the hottest ever recorded, and the U.S. has experienced deadly heat waves this decade such as the 2021 heat dome in the Pacific Northwest that killed hundreds of people. Heat waves in U.S. cities have become more frequent and the heat season has gotten longer, according to the U.S. Environmental Protection Agency. As doctors and public officials tackle the rise in dangerous health effects, there are early efforts to assess heat's financial toll. In California alone, the state found in a study published last year that seven extreme events over a 10-year period from 2013 to 2022 caused $7.7 billion in economic harm, including $44 million in lost milk production from a single 2017 heat wave in the Central Valley (cows produce less milk in very hot conditions). 'Bespoke' predictions One challenge for predicting a heat wave's impacts, says Anand Srinivasan, a Cotality executive who develops climate change-related products, is that heat damage is relatively complex to model. Many different variables determine its impact. For starters: How long does the heat wave last? Is it dry or wet heat? Does it cool down at night? And the risks are industry-specific. A business with an outdoor workforce has much more to worry about than one whose employees have air-conditioning. As of last year, Cotality models not just "acute' perils like wildfires and floods but also "chronic' ones: extreme heat, drought, cold waves and extreme precipitation. The first edition of its chronic-peril modeling tool offers risk indices for heat down to an address level, but doesn't estimate the monetary impact of a heat event. "What we can do is provide the analytics and data for people,' says Srinivasan. "That way, a typical [company] risk manager would say, 'Okay, do I keep my office open during this heat wave? What kind of extra support do I need to provide to my personnel?'' Srinivasan says he expects modeling of heat waves' financial consequences, industry by industry, will follow eventually. The data firm Skyline Partners, which has offices in Colorado and the U.K., has developed metrics for a custom parametric insurance policy covering dairy cows stressed by heat. Laurent Sabatié, Skyline's co-founder and executive director, says figuring it out required a "substantial amount of analysis.' Wildfire and hurricane models have been "commoditized' to a certain extent, he said, but heat prediction is still "bespoke' since it is industry-specific as much as place-based. In the past, insurance companies have sometimes perceived changes in climate risk too late and ended up paying out dearly after outsized events. Two examples are Hurricane Andrew in Florida in 1992 and Northern California's Camp Fire in 2018. In both cases, insurers sustained losses far outside the expected parameters; each disaster led to investments in far more accurate modeling of hurricanes and wildfires, respectively (and then in higher premiums for customers). The technology to run a full hazard analysis on heat for any industry or city is there, says Cole Mayer, who runs parametric products for Aon PLC, a risk management firm. But clients' appetite to pay for more insurance is still limited. "There's a risk perception evolution that needs to happen,' says Mayer. AI and crypto, with their dependence on heat-sensitive data centers, may propel the growth of the market, he adds: "These are exposures that didn't exist to the same extent 10 years ago.' Dave Bigelow, a climate risk advisor for Aon, thinks time alone will do it. "We've got hundreds of years of records of floods and hurricanes and acute perils,' he notes. "But for heat, we're just starting to see it' in the data.
