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Emergency guidelines from the U.S. Federal Emergency Management Agency (FEMA). In the event of an unknown explosion that may be accompanied by a chemical leak: Determine as quickly as possible the location of the explosion and any potential chemical leak, if possible. Immediate evacuation from the explosion/leak area! If something falls around you, hide under a sturdy dining table or desk. When the dropping stops, leave quickly, being careful of floors and stairs that are clearly unstable. When evacuating the building, be especially careful of falling debris. Do not stand by windows, glass doors, or other areas with potential hazards. Make way on the sidewalk or street for emergency responders or other people who have not yet evacuated. If an explosion/leak occurs in the building where you are, you should: leave as soon as possible, while avoiding the contaminated area. If there is smoke, bend down. Do not stop to go back for personal items or make a phone call. Do not use the elevator. If it is not possible to leave the building or to pass through the explosion zone, then find a location as far away from that zone as possible and take protective measures on the spot (see at the end of the text). If an explosion occurs while you are outside, you should: figure out the fastest way to find fresh air. Determine whether you should flee as soon as possible or take shelter inside the nearest building. If choosing to flee, determine the wind direction and move immediately toward the upwind side of the explosion site. If you are trapped in the ruins, you should: If possible, use a flashlight to signal rescuers and let them know your location. Tap on pipes or walls so that rescuers can locate where you are. If possible, whistle to signal the rescuers. Don’t shout unless it’s absolutely necessary. Shouting can cause you to inhale dangerous amounts of dust. Avoid unnecessary movement so you don’t stir up dust. Cover your mouth and nose with anything you have at hand. (Densely woven cotton is great for filtering.) Try to breathe through this material as much as possible. ) If you are told to stay at home, or decide to take shelter in place for other reasons: use all available information and your common sense to determine when it is necessary to flee and when it is appropriate to take shelter in place. If your family and pets are with you, make sure they go inside together. Lock the doors, close the windows, and shut off the vents and fireplace. Turn off the fan and air conditioner. Hide in the rooms on the inside, with as few windows as possible. Bring your emergency supplies. Seal all doors, windows, and vents with 2-4 millimeters thick plastic sheeting and tape. You can cut the plastic wrap in advance to save time. When using adhesive tape, stick it to the corners first, then seal the edges. Local authorities **may not be able to provide emergency response information immediately. But you should still pay attention to television, radio, and the Internet to stay informed at all times.