Why is the wildfire in France so hard to put out?

Firefighters in southwest France are fighting against a mega-fire four times the size of Paris. Temperatures are expected to climb above 40C. Our Science Correspondent Martin Stew reports from near Bordeaux. #wildfires #france #heat

• Subscribe to ITV News on YouTube: http://bit.ly/2lOHmNj
• Get breaking news and more stories at http://www.itv.com/news

Follow ITV News on TikTok https://www.tiktok.com/@itvnews?lang=en
Follow ITV News on Instagram: https://www.instagram.com/itvnews/
Follow ITV News on Facebook: https://www.facebook.com/itvnews/
Follow ITV News on X: https://twitter.com/itvnews