The following video is brought to you courtesy of the Sky News YouTube Channel. Click the video below to watch it now.
An unprecedented number of major fires have burned millions of acres in California, Oregon and Washington this year, throwing up choking smoke and sending air pollution across the country and beyond.
Researchers at Stanford University in California estimate there were between 1,200 and 3,000 excess deaths in California alone in one 40-day period in the late summer.
SUBSCRIBE to our YouTube channel for more videos: http://www.youtube.com/skynews
Follow us on Twitter: https://twitter.com/skynews
Like us on Facebook: https://www.facebook.com/skynews
Follow us on Instagram: https://www.instagram.com/skynews
For more content go to http://news.sky.com and download our apps:
Sky News videos are now available in Spanish here/Los video de Sky News están disponibles en español aquí https://www.youtube.com/channel/UCzG5…”