Hospitals in Moscow have postponed elective surgery until autumn, as the abnormally hot weather could worsen patients' conditions, RIA Novosti news agency reported on Tuesday.
"We are trying not to carry out elective surgeries now, but we will continue to conduct immediate surgeries," said an official from a hospital, Xinhua reported.
Local media said such a decision could have been made by the doctors themselves, as no official injunction of this kind has been issued.
But elective surgery would only be delayed after patients give their consent, the official added.
The Russian capital has been suffering a wave of scorching heat, with temperatures this week beating the 35-37 degrees Celsius ever recorded.
This July has been the hottest month on record. Scientists say this summer is one of the three hottest in Russia over the past 130 years.