The Copernicus EU Sentinel-3A satellite captured this image of smoke from wildfires in the US state of California on 9 October 2017. Wildfires broke out in parts of the state on 8 October 2017 around Napa Valley, and the smoke was spread by strong Northeasterly winds. See: http://m.esa.int/spaceinimages/Images/2017/10/California_fires
