USA / CANADA, Earth - September 7, 2017 - This worrying satellite image was the state of affairs yesterday in the north-western United States and south western Canada as wildfires swamped a region roughly the size of Western Europe in dense smoke. The image was captured by the NASA MODIS satellite instruments on September 6, 2017. Numerous fires continue to burn across Calfornia, Montana, Oregon and several Canadian states - Picture by Atlas Photo Archive/NASA *Latest data available. Normal repro fee for any online or print use