A toxic chemical cloud from an industrial accident could jeopardize an entire community within minutes, putting the lives of thousands of people at risk; a cargo ship carrying ammonia nitrate explodes, killing 500 people in Texas in 1947.
A scenario demonstrates the potential for disaster from a "runway incursion" at a busy airport; 583 people are killed when two airliners collide in the Canary Islands in 1977; 34 people die when two planes collide in Los Angeles in 1991.
Analysis considers the deadly implications if airborne anthrax were unleashed over the U.S. in a biological attack.
A new theory suggests that a megastorm caused one of the largest floods in the history of the planet, creating the English Channel and turning Britain into an island separated from the continent of Europe.
Researchers study a comet explosion 13,000 years ago that ignited a firestorm across much of North America and killed nearly every living thing, including the Clovis human culture.
Scientists speculate about a repeat of an Aegean Sea incident, as when a huge volcanic eruption on Santorini 3,500 years ago caused a tsunami that wiped out Minoan civilization on Crete and prompted the Atlantis myth.
Examining the potential for disaster in Las Vegas, if a railway accident befell nuclear waste being transported for permanent storage below Nevada's Yucca Mountain.
Scientists and engineers sound an alarm that a catastrophic dam failure might be the next mega-disaster facing America; a dam gives way near Johnstown, Pa., killing 2,200 people in 1889.
The supervolcano Toba erupts on Sumatra 75,000 years ago, causing a sudden volcanic winter that shocks the climatic balance around the world.
Scientists piece together evidence of a tsunami that may have ravaged the Mediterranean world around 6,000 B.C., sweeping away villages and killing an untold number of people.
The Mediterranean Sea bursts through the Bosporus Strait 8,000 years ago, inundating a valley twice the size of Ireland in a flood of biblical proportions.
Some scientists theorize that mass extinctions happened on Earth 65 million years ago due to powerful megastorms known as hypercanes, reaching 20 miles into the stratosphere.
Today more than 3 million people live in the danger zone surrounding Italy's Mount Vesuvius volcano, which erupted in 79 A.D., buried the Roman town of Pompeii and killed about 5,000 people.
Researchers speculate about what might happen if Los Angeles sustained a 7.5-magnitude earthquake attributable to the Puente Hills thrust fault.
Experts predict what might happen when the world's oil supply runs out, ranging from warfare over necessities to the development of new technology.
Entomologists try to comprehend and control destructive swarms of locusts that have been plaguing mankind throughout history; American pioneers endure a swarm estimated as being 1,800 miles long and 110 miles wide.
Historians imagine what might happen to the U.S. if an extended drought were to leave the country unstable and economically depressed.
Historians imagine how modern New York City might fare if struck by earthquakes of the magnitude recorded in 1737 and 1884.
In a hypothetical, future disaster scenario, comet dust seeds Earth with a virulent virus that quickly spreads across the planet and claims millions of lives.
A warmer climate may cause oceans to rise and may eventually lead to an increase in hurricanes.
Historians imagine what might happen in a city like San Diego if a gigantic methane-gas explosion occurred in the Pacific Ocean between California and Hawaii.
Historians imagine how an event similar to the 1868 eruption of the Mauna Loa volcano, which triggered two major earthquakes, would impact Hawaii today.
The eruption of the Krakatoa volcano in 1883 was one of the deadliest natural disasters in recorded history.
Scientists believe gamma ray bursts were responsible for the mass extinction on Earth 450 million years ago; examining how cities would fare in the face of a global catastrophe.
The effects of a lethal comet-strike near the coast of San Francisco.
How a repeat of the 1906 quake might affect San Francisco.
The disaster in New Orleans showed how fragile a levee system can be. Experts investigate the terrifying results a similar hurricane could cause in California.
Experts fear that an abrupt climate change could cause devastating winters in northern regions.
The 1917 explosion that killed 2,000 people in Halifax, Nova Scotia, could happen again in Boston in a worse-case scenario.
Using CGI and re-enactments, an 1888 tsunami sparked by an earthquake is studied to gauge the effect a similar catastrophe would have on America's East Coast.
A scenario in which Chicago is hit by three fictional tornadoes.
A possible eruption of the Yellowstone "Mega-Volcano" may create a global cataclysm beyond human comprehension.
The possibility of a killer earthquake striking America's heartland.
Tsunamis, firestorms and dust clouds following an asteroid impact on Earth.
Volcano experts map out a hazard zone and engineer a sophisticated warning system in anticipation of a possible eruption of Mount Rainier.
Explore the extensive history of northeast hurricanes; what would happen if a Category 3 Hurricane were to hit New York City.
In May 1999, a major tornado carved a path of destruction through Oklahoma City. What would happen if the same deadly winds struck densely populated Dallas?
The impact of a major earthquake/tsunami would have on the West Coast of the United States.
Científicos arman juntos evidencias de un tsunami que puede haber devastado el mundo mediterráneo en el año 6000 AC, arrasando aldeas y matando a un número incalculable de personas.
Expertos usan lo más reciente en computación para examinar el posible impacto de un cometa de tres millas de diámetro que caiga en la Tierra. Terremotos, tsunamis y radiación provocarían millones de muertes.