These maps show how much damage a North Korean thermonuclear weapon could do to major American cities October 14 2017

Nuclear weapons may be humanity's most terrifying creations, but most people would be hard-pressed to say what, exactly, such an explosion might do to their town or city.

To help the public get a handle on nuclear threats, Alex Wellerstein, a historian of science at Stevens Institute of Technology, created Nukemap: an interactive simulator that lets you set off a nuke anywhere on a world map.

A recent update even lets you predict where clouds of radioactive fallout might drift based on current weather.