Regular smoke alarms will only do this one thing
Fire safety is important, and smoke detectors perform a critical part in shielding your family. Even so, smoke detectors have their limitations. To illustrate, they are only able to identify smoke, not heat. In the event there is an emergency in your residence, you might not be warned unless the smoke rises to the smoke detector. While there are some other unmistakable signals of fire -- including a sudden rise in heat -- if you don’t have smoke, you will fail to get a warning from your smoke detector.
Additionally, smoke detectors only beep if they find an adequate amount of smoke. If a fire begins slowly, you might not be alerted until it's too late. Various smoke detectors use dual-sensor technology, meaning they will be able to perceive smoke from both roaring flames and something less intense. If they start beeping, it’s required of the homeowner to contact first responders after safely leaving the premises.