Video footage of a train near the community of Armstrong, Ontario, highlights the speed and ferocity of one of more than 100 wildfires currently burning in Canada. 'This could potentially overtake us here … This has gotten a little scary,' says a crew member as a wall of flames whips across the windows. 'We’re encased in flames now.' The railway company Canadian National confirmed the crew has been 'safely evacuated' from the area

• Wildfires in Ontario make Toronto air quality worst in world