Settlement Survival/Random events

Random Events come at random times. All require you to be beyond year X. Some require a certain population size or higher. No single event can happen more than once every 3 years. Some events have a fixed length, while others vary. Some events can be good, bad, or terrible. The worst of the worst can be devistating to your village and turn your thriving village into a ghost town.

Tornado
Tornados can happen in any day or month of the game. The most that they can spawn is once every 3 years and only have 1 at a time. You are given an alert in the news feed when one begins, your game speed will also be slowed to 1x at this time. The tornado always spawn on the edge of the map and has a slow movement speed. The angle will not change much and you should be able to predict what is in its path. Any building in the path, that doesn't have the proper upgrade, will be destroyed, loosing all of its contents, and upgrades. Any citizens under the twister will also be killed. Depending on the path, you may want to quickly upgrade some key buildings to prevent them from being destroyed. Also calling for everyone to run to the mountain side shelter could save some lives.

Snowstorm
The blizzard can happen once every 3 years and only starts between day 211 and 360. Another requirement for the event to trigger, is your settlement must have at least 50 citizens. When the blizzard starts, you will be alerted in the news feed, the game speed will go to 1x and audio will change to be that of a blizzard. During the blizzard the temp drops to -70f and all crops quit proving yields. Workers also take a work speed debuff[Citation needed].The temp drops to -70f and all crops quit proving yields. Workers also take a work speed debuff[Citation needed]. During this time citizens loose their warmth extremely quickly. Those without clothes will even freeze faster. When a citizen is cold they will attempt to warmup at a Boiler building, their house, or a random house, all 3 of these require a fuel source for the citizen to warm up properly. The main cause of death during blizzards will be freezing, starvation, and dehydration. So be sure to have plenty of fuel, food, water and clothing stored up.

Fire
For a period of days, fires can randomly break out throughout your village. The fire will spread from building to build and can quickly destroy your village if you do Big Wells near by. Up to 50 citizens will assist in putting out the fires but your fire count can spread way behind that. The best protection against fires is to have some Big Wells spread throughout your village.

Plague1
During a Plague many citizens will hit with the Plague. Just like any other diese they will spread it to other citizens. They will attempt to get treated in Clinics and Hospitals but while heading to the buildings they pass it along to others. Unknown protection at this time.

Plague2
See Plague1. Difference is the trigger requirements for at which point the event triggers Need More Info

Great Harvest
For this event all your Field, Fertile Field, Nursery. Planation, Orachard and Grove [citation needed] are raised by 30%, for a one time harvest boost.

Extreme Heat
It is hot outside. The rivers dry up, which means no river based machines will work. Farms also have reduced output and other debuffs may be present. Best way to prepare is by having a good store of food and some non-water based production buildings.