Flammability is a measure of how likely a building can catch on fire. Industrial zones, areas with a high crime rate, and dilapidated neighborhoods (areas with lost of abandoned housing) usually house buildings that are the most susceptible to fire, while wealthier structures and neighborhoods, such as areas with mansions, and electronic industries are at the lowest risk.

A graph/plot chart was first implemented in SimCity 3000 and its expansion, though the statistic itself may have existed in SimCity 2000 and earlier. Since then, flammability statistics have been available in SimCity games after SimCity 3000.