Most of the blazes are in a region that saw possibly the hottest-ever temperature above the Arctic Circle this month.
Much of Siberia this year has had unseasonably high temperatures, leading to sizable wildfires.
The temperature in Verkhoyansk hit 38 degrees Celsius on Saturday, according to Pogoda i Klimat, a website that compiles Russian meteorological data.
This time weather experts think the blackout was caused by smoke from wildfires mixing with heavy rain clouds.
The fires are now raging some 10 to 15 kilometers from the megaslump crater - a large hole in the frozen Arctic soil which highlights the dramatic speed of thawing permafrost.
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