food in the food storage box is lost and the city's population
is reduced.

FIRE: Fire can hit any city at any time. It can be prevented by
building an Aqueduct improvement. Fire destroys one city
improvement.

FLOOD: Flood can strike any city built adjacent to an River
square. It can be prevented by building a City Wall. Flood
reduces city population.

PIRACY (Yeah, our favorite topic): Pirate raids may strike any
city built adjacent to an Ocean square. Pirates can be prevented
by building a Barrack. Pirates remove all food from the food
storage box and destroy whatever is being built in the
production box. All resources spent so far in production are
lost.

PLAGUE: Plague may strike any city at any time. It can be
prevented by acquiring the advance of Medicine or by building
and Aqueduct improvement. Plague reduces the city's population.

VOLCANO: A volcano may erupt and damage any city built adjacent
to or on Mountain terrain. The effect is a volcano may be
negated by building a Temple improvement in the city. Volcanic
eruptions reduce the city's population unless negated.