Regular smoke alarms can only do one thing
Fire safety is a crucial consideration, and smoke detectors take on a vital part in keeping your family safe. Despite that fact, smoke detectors have their drawbacks. To illustrate, they are only able to react to smoke, not high temps. If there is an emergency in your house, you might not be warned before the smoke ascends to the smoke detector. While there are some other telltale indications of fire -- such as a sharp heat increase -- if there’s a lack of smoke, you won’t have a triggered smoke detector.
Additionally, smoke detectors only sound the alarm when they encounter ample smoke. When a fire begins slowly, you may not be warned until the flames are out of control. Some smoke detectors employ dual sensors, which means they will recognize smoke from both roaring flames and a more gradual burn. If they start beeping, it's up to the resident to call first responders after they safely leave the premises.