"Nuclear warfare is a serious threat that hasn't been mentioned yet. The following was common knowledge during the cold war era, but most people my age don't know what to do in a nuclear disaster. In a nuclear explosion most of the damage and death is caused by the shockwave the blast creates, not the fireball which has a comparatively small radius. One day you may find yourself outside or looking out a window to see an extremely bright flash. As bright as if you were staring straight at the sun. Do not attempt to locate the source of the flash. You have maybe 8-10 seconds to respond if you're far enough away from the fireball. Lay face down on the ground and put your thumbs in your ears and fingers over your eyes. Breathe through your teeth. Since you're laying face down the shockwave will mostly pass over you. If you're standing up it can cause your lungs, eardrums, and other organs to explode. Once the shockwave passes over you, you need to find shelter immediately. I said before that most death from the explosion is caused by the shockwave. Well, FAR more death is subsequently caused by nuclear fallout AFTER the blast. Do not attempt to travel anywhere. Just get underground. If you're next to a complete stranger's house or a business, don't hesitate to go inside and hide out under as much concrete and steel as possible. You need to remain in this location for the next 48 hours. This is critical. Even if you survive the blast if you attempt to go home and spend just 20 minutes outside traveling you will more than likely die of radiation sickness. Radioactive material after a blast decays exponentially and you will be safe to try and find your loved ones after 48 hours. If you don't wait this out, you definitely won't be alive to find them. When you're ready you need to leave the city and get as far from the fallout as you can."