From the Boardgame Geek:
It's 2020, and a disaster has occurred, damaging nuclear reactors around the country. There's no time to lose; your help is required, and you must lead an evacuation operation to get your people to safety. Rescue them in time!
The game board in Meltdown 2020 is composed of twelve tiles, each consisting of seven hexes. Seven nuclear reactors and two airfields are scattered amongst the landscape hexes that make up the remainder of the country. At the start of the game, your color-coded twenty people and three vehicles (car, bus, helicopter) are placed on their designated hexes. You need to get them to the airfields to save them, preferably before they absorb too much radiation. You can airlift a vehicle out of an airfield, too, to save the driver, but then you have fewer opportunities to save more people.
Language Note: This is a multiple language edition game. Manufacturer’s rules are in multiple languages (including English). Game components are language-independent.