Regular smoke alarms can only do one thing
Fire safety is a crucial consideration, and smoke detectors perform an essential part in shielding your family. However, smoke detectors have some drawbacks. For example, they will only react to smoke, not high temps. If there is an emergency in your house, you would not be alerted until the smoke reaches the smoke detector. Even though there are some other telltale signs of fire -- such as a sudden heat increase -- if there's no smoke, you will fail to get a warning from your smoke detector.
Additionally, smoke detectors only activate if they encounter ample smoke. In the event a fire creeps along slowly at first, you may not be cautioned until the flames are out of control. Many smoke detectors utilize dual-sensor technology, meaning they will recognize smoke from both a raging fire and a more gradual burn. Whenever they start beeping, it falls to the resident to call the fire department after they safely leave the residence.