Switch to a new climate.
Cht: Climate <newclimate>
This cheat switches to the given climate: 0=temperate, 1=arctic, 2=tropical, 3=toyland.
It is somewhat dangerous, because it means that the existing industries and vehicles are for the wrong climate. This means that some of your transport routes may be useless and need to be adjusted. It is advisable to keep a backup savegame from before using this sign cheat in case something goes wrong.
This cheat may be useful for example to buy vehicles that are not normally available in the current climate.
Note that the climate-specific graphics will not change until you save and reload the game.
Warning: TTD doesn't load initial climate data, you can't save switch from one climate to another and then use it to play, it's not safe to do so!