Regular smoke alarms will only do one thing
Fire safety is a crucial consideration, and smoke detectors play a critical part in keeping your family safe. Even so, smoke detectors have some shortcomings. For instance, they can only identify smoke, not extreme temperatures. When there is an emergency in your home, you may not be warned unless the smoke ascends to the smoke detector. While there are further significant indications of fire -- such as a marked increase in warmth -- if you don’t have smoke, you won’t have a triggered smoke detector.
Additionally, smoke detectors only sound the alarm when they detect enough smoke. In the event a fire starts small, you may not be alerted until it's too late. Some smoke detectors use dual sensors, which means they will recognize smoke from both a blazing inferno and smoldering remnants. Then when they sound their alarm, it’s required of the resident to notify first responders after exiting the premises.