Fire - Fire is one of the biggest fears of many townsfolk, particularly in smaller towns. Due to closely packed wooden houses and inadequate water supply, fires are difficult to control without using magic (which is not always available) and can produce widespread damage. There were other factors that increase the risks of fire. Beds are often made of straw and are commonly kept close to open hearths for warmth. Roofs of reeds, rushes and straw are also common.
In many large cities these materials are forbidden in favor of tile and shingles.