Nuclear Winter

"Hanging in the atmosphere, the clouds of debris shut out the sun's heat and light. Across large areas of the Northern Hemisphere, it starts to get dark, \it starts to get cold. In the centers of large land masses like America or Russia, the temperature drop may be severe, as much as 25 degrees centigrade. Even in my country (South Korea), within days of the attack, it could fall to freezing or below for long, dark periods."

--Su Ji-Hoon, The Frost of Pika

Read more: https://www.springfieldspringfield.co.uk/movie_script.php?movie=threads

Read more: https://www.springfieldspringfield.co.uk/movie_script.php?movie=threads

Nuclear winter is a severe and prolonged global climatic cooling effect hypothesized to occur after widespread firestormsfollowing a nuclear war. The hypothesis is based on the fact that such fires can inject soot into the stratosphere, where it can block some direct sunlight from reaching the surface of the Earth. It is speculated that the resulting cooling would lead to widespread crop failure and famine.[4] When developing computer models of nuclear-winter scenarios, researchers use the conventional bombing of Hamburg, and the Hiroshima firestorm in World War II as example cases where soot might have been injected into the stratosphere,[5]alongside modern observations of natural, large-area wildfire-firestorms.

In When the Cold Breeze Blows Away, it would be happened when black rain was over or started,which cause nuclear winter