The tornado super outbreak in April 2011 is unprecedented; over just 4 days, 360 tornadoes leave a trail of devastation as deadly weather systems build along the southern states of the USA.
Nepal is hit by a 6.7 mega-earthquake that kills thousands; across the country, survivors are hit by terrifying avalanches that destroy everything in their path; presenting stories of survival, from the Kathmandu Valley to Mount Everest.
On Oct. 1, 2015, the cargo ship El Faro is on a regular run to Puerto Rico when it disappears in a Category 4 storm called Hurricane Joaquin; it is determined that the El Faro sank off the coast of the Bahamas with 33 crew members.