Yes, smoke residue is harmful to one’s health and can be toxic. Since smoke contains tar, carbon, and other heavy metals and toxins, smoke residue can cause health issues such as, breathing complications, lungs and sinus issues and skin irritations. Also, any carbon monoxide left behind from the fire can prevent oxygen from reaching the heart, brain and other vital organs. Fires aren’t always confined to one room, as the smoke can easily travel to other rooms of your property. As it attaches itself to curtains, beds, carpets, and other soft surfaces, it leaves unspent fuel residue, making it easier to catch fire in the future. It’s imperative to hire a professional to thoroughly clean your property of smoke residue.