However, there has been some success in the extinguishing work. Just a few days ago, the fires were three times greater. In remote parts of the region, pilots have now flown and pushed chemicals into rain clouds, causing them to drop raindrops. A technique called cloud seeding.

- You have, so to speak, created artificial rainy weather. It is a technology used in some countries to control where rainy weather should rain out. Small particles are injected to act as condensation cores. Humidity and water should condense on them and then rain out and help to extinguish as well as possible, explains SVT meteorologist Nitzan Cohen.

4.62 million hectares have been burned

The environmental organization Greenpeace, which is monitoring the fires in Russia, confirms that the rain has helped reduce the fires, but that other firefighters have blazed up near Irkutsk and Krasnoyarsk.

They estimate that 4.62 million hectares (about 46,200 square kilometers) of forest have been burned in Russia since the turn of the year. To get a perspective on how much it is, the big fire outside Sala in 2014 was about 13,000 hectares.

record Temperatures

A map showing the land temperature. Red indicates that it is warmer than normal. Photo: EPA / NASA / TT

- It has been very high-pressure for a long time, and so it has also become warm in connection with this. We have seen temperatures rarely seen far north. Record-wise even, says Nitzan Cohen.

According to Copernicus, the EU's Earth observation program, the temperature in the Arctic and Siberia was more than five degrees above the June average.

According to Reuters, researchers fear that record temperatures around 38 degrees will cause forest fires to continue. This, in turn, will cause more greenhouse gases to be released into the air.