File:Heat wave in Arkhangelsk Oblast, Russia (Copernicus).jpg

English: This image shows the land surface temperature (LST) over Northwest Russia as measured by one of the two Copernicus Sentinel-3 satellites on 13 May 2021 (NB: the LST is the temperature of the soil and should not be confused with the air temperature). This image highlights the areas of the Arkhangelsk Oblast that fall within the Arctic Circle in which the LST reached values above 30°C, while in areas just below the Arctic Circle it was often approaching 35°C. In the same areas, air temperatures reached 27°C. This value represents a temperature anomaly of between 13 and 20 degrees C, depending on sources, above typical maximum daytime temperatures for this time of year in the area. Other regions of Russia are also affected by abnormal temperatures. In the Chelyabinsk region, it the Main Directorate of the Ministry of Emergency Situations recommended to cancel all public events and limit the stay of children in the open air. The Copernicus Sentinel-3 mission is composed of two twin satellites (Sentinel-3A and Sentinel-3B) both equipped with the Sea and Land Surface Temperature Radiometer, an instrument whose main objective is to provide Sae and Land Surface Temperature (SST, LST) with a very high level of accuracy, for both climatological and meteorological applications.