During a fire, what is the best immediate action for someone who is trapped inside a building?

Staying low to the ground is the best immediate action for someone trapped inside a building during a fire because smoke rises. When a fire occurs, toxins and heat accumulate near the ceiling, while the air closest to the ground is cooler and often contains less smoke. By staying low, individuals can breathe easier, reducing the risk of inhaling harmful smoke and increasing their chances of escaping safely. If they shout for help, it may attract attention, but if they are unable to move due to smoke inhalation or fire, this action does not address their immediate safety. Attempting to extinguish the fire can be dangerous and is not a recommended action when trapped. Running towards the flames can lead to more danger and does not assist in finding an escape route.