Two key prevention strategies for preventing backdraft and flashover include...

• A. Early detection and applying water to cool the environment.
• B. Ventilation without prevention.
• C. Shutting doors and windows only.
• D. Ignoring warnings.

Answer: (A)

Preventing backdraft and flashover hinges on controlling heat and gas buildup while recognizing warnings early so you can act before conditions deteriorate. Early detection of signs such as heavy, worsening smoke, rising heat indicators, or visual cues like rollover gives you critical time to adjust tactics and implement cooling. Applying water to cool the environment directly lowers the temperature of gases and surfaces, slows the release and ignition of flammable vapors, and stabilizes conditions, reducing the chance that a rapid transition to ignition will occur. Together, spotting trouble early and cooling the space addresses both the heat and fuel aspects that drive these dangerous events. The other options don’t provide this protective combination: ventilation without prevention can feed the fire, shutting doors and windows alone misses the cooling and gas-control steps, and ignoring warnings is not a usable strategy.