Popular tourist sites in the Chinese city of Shanghai will not be lit for two nights to save electricity, officials say.
The waterfront area, known for its mix of historic and futuristic buildings, is one of the most famous landmarks in China's financial center.
Shanghai is not the only one affected by the restrictions.
And in some other parts of China, such as Sichuan province, electricity restrictions were ordered due to severe droughts amid a record-breaking heat wave.
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Shanghai city authorities announced that buildings in the Bund, along the city's largest river, will not be illuminated on Monday and Tuesday.
"We apologize for the inconvenience," the statement reads.
China issued its first national drought warning of the year last week after areas including Shanghai in the Yangtze River Delta region and Sichuan in southwest China were hit by weeks of extreme heat.
"Yellow Alert" is the third most severe level on the official scale.
Officials in Sichuan province, where temperatures have exceeded 40 degrees Celsius, said in a recent statement that rising temperatures and low rainfall, along with increased air conditioning, have caused power shortages.
The province has extended electricity saving measures for five days until Thursday, media reports.
Power supply to some industries is also limited.
German carmaker Volkswagen told the BBC that its plant in Chengdu, the capital of Sichuan, remains closed.
A Volkswagen spokesman said the company expected a "slight delay" in deliveries which could return to previous levels "in the near future".
"We are monitoring the situation and are in close communication with our suppliers," added the spokesperson.
Japanese car giant Toyota told the BBC that it is gradually resuming production in Sichuan "using electricity from its own production".
The impact of the blackout is likely to be short-lived, said Chenyu Wu, associate analyst for China and North Asia at the consultancy. Risk Control, for the BBC.
"Efforts to save energy and increase production are likely to help alleviate the power shortage situation in the coming weeks, especially if the heat wave ends, which we hope," he adds.
Authorities have taken measures to trigger rainfall in parts of central and southwestern China due to a heat wave, the longest ever recorded in the country.
Provinces around the drought-stricken Yangtze River - Asia's longest waterway - turned to cloud seeding operations to cope with the lack of rain, while authorities in Hubei and a number of other provinces launched chemical rockets into the sky, local media reported.
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