What should a fireman do if he realizes his vision is becoming obscured and the heat in the room is rising?

When a firefighter notices that visibility is deteriorating and the temperature is increasing, the best course of action is to remain calm and crawl out of the area immediately. This choice reflects the understanding that smoke and heat pose immediate dangers in a fire environment. Crawling helps a firefighter stay low to the ground where the air is cooler and clearer, reducing the risk of inhalation of toxic fumes and improving the chances of escape.

This approach emphasizes the necessity of situational awareness and the importance of decision-making under stressful conditions. By prioritizing a methodical escape rather than engaging in potentially hazardous actions, the firefighter increases their safety and the likelihood of reaching safety before the situation worsens.