Wildfires break out in the boreal forests of eastern Russia most summers, but last year was particularly bad. This image from the Copernicus EU Sentinel-2A satellite was taken on 28 September 2016, and shows blazes that had plagued Russia’s Irkutsk Oblast since July. It is thought that drier conditions associated with warmer weather – with June 2016 being the hottest on record – contributed to the unusually large number of fires. Discover more: http://www.esa.int/spaceinimages/Images/2017/05/Russian_wildfires