In modern cities, most people live or work in tall buildings. If we are careless about fire, it is easy to cause fires. It not only can take many lives, but also can cause damage. Therefore we must regard fire as a serious event. Prevention is better than cure. How to measure is a serious problem. For example, residents should prepare equipment like fire extinguishers and fire detectors. To inspect the facilities in the buildings is important. When we leave the house, we should turn off the light and gas stove because they might cause fire. To sum up, heavy casualties in fires mostly result from failure to obey the fire safety rules. If we follow fire prevention steps, we have a safe environment to live.