One spark from an ATV in the woods outside Fort McMurray, Alberta, Canada creates a fire that becomes the costliest disaster in Canadian history and causes Michel Chamberland to flee his childhood home with only minutes to spare.
On April 25, 2015, climber Jost Kobush is resting at the Southern base camp on Mount Everest when a 7.8 earthquake shakes him out of his sleeping bag. He runs for his life as an avalanche bares down on hundreds of vulnerable climbers.
When Chicago is hit with a massive blizzard, commuters are caught off guard on Lake Shore Drive where Lonnie Washington is trapped in his car on a bridge, completely buried in snow and nearly out of gas.
Kris and Mandy Lancaster are still in their home when a massive EF-4 tornado blows in and tears it apart. But while Kris's family is in the basement, he remains on their front porch filming the tornado as it barrels towards him.
Mauro Prosperi runs the Marathon des Sables, a six-day, 155 mile race through the Sahara desert. When a sandstorm strikes, the former Olympic pentathlete is lost in the desert for 8 days, drinking urine and the blood of bats to survive.
Sheena Junia, 26, literally rides out the waves of a powerful typhoon by paddling on her surfboard as the ocean surges and drowns her village. Outside, surrounded by black water, she can barely see, and accepts that she could die.
Stephanie Liddick, 25, and her daughter, McKenna, 6, pull their car over because of intense hail. But the hail clogs a drainage gate and a flash flood traps the two in their electric car as the water rises - and rises.
Storm Chasers Jeff Pitrowski and his wife have to run for their lives from an EF5 tornado, but then return to the aftermath to begin pulling people out of the rubble.
California firefighters scramble to keep a wildfire from jumping a highway. But when they get to the top of the hill they find not only are they way too late, they must retreat. NOW.
A BBC news crew and a mountain guide get caught up in a dangerous explosion on Mount Etna and have to escape the lava and rocks raining down on them quickly, or risk getting swallowed by lava and hot ash.
