Husband and wife storm chasers, Jeff and Kathy Piotrowski, chase down a Missouri tornado; a twister in Nebraska chases meteorologist Mark Robinson; meteorologist Jaclyn Whittal witnesses one of the widest tornadoes ever.

Backpacker Benjamin is almost taken down by severe wind and dozens of falling trees; George is almost burned to death by acid rain caused by an erupting volcano; Gene risks his life when twin tornadoes levels his bank.

An arctic blast traps hydro worker Michael who has been working in extreme cold weather conditions for decades; pilot Gerald gets caught in an intense Antarctic blizzard and becomes limited fuel traps him.

Experts analyse the strength, speed and power of tornadoes, while the survivors tell their tales; extreme explorer George Kourounis experiences a near-miss with death when heavy farm equipment smashes his vehicle.

A wildfire suddenly surrounds a news reporter; a photojournalist survives a fire only to be stuck in a mudslide a week later; a couple gets trapped on a lake surrounded by a forest fire.

Hurricane experts explain the process of formation of tropical cyclones; out in the field, a hurricane traps bass fisherman Andy Buss in the middle of Lake Erie.