A nurse is assisting with a community health presentation about home safety precautions when there is an outdoor chemical disaster nearby. Which of the following instructions should the nurse include?

A. Opening the dampers of fireplaces: This instruction is not appropriate during an outdoor chemical disaster. Opening the dampers of fireplaces can allow contaminated air from outside to enter the home, increasing exposure to hazardous substances. It is best to avoid introducing outdoor air into the home during such incidents. B. Turning on ceiling fans and air conditioners: This instruction is also not recommended during an outdoor chemical disaster. Turning on fans and air conditioners can potentially circulate contaminated air within the home, leading to increased exposure. It is best to turn off fans and air conditioners during such incidents and focus on evacuating the area. C. Covering heat registers with plastic and tape: This would help seal the house and prevent contaminated air from entering through heating vents. D. While evacuation is essential in some situations (such as fires), it’s not the first step during a chemical disaster.​​​​​Immediate evacuation may not be safe if the outdoor environment is hazardous. First, take protective measures within the home.