This warning sign should be posted in an easily visible location to raise awareness of the potentially toxic chemicals, gases, and combustion byproducts that may be present inside a home or building affected by a fire. In the days, weeks, and months following a fire, people will need to gain access inside the affected area, which may include insurance adjusters, inventory specialists, textile cleaning companies, restoration contractors, tenants or occupants, and others. This sign provides a good reminder of the importance to wear proper personal protective equipment and to think about safety first.