How to survive a nuclear blast: If you see a bright flash in the sky, do not stare at it, seek shelter in a trench or behind a wall. If that is not available, get on the ground and cover yourself with a coat or a thick blanket you can throw off when it catches fire. Keep your mouth open and do not halt your breath. This will protect you from going blind and suffering severe burns from the thermal radiation and lung rupture from the blast wave. Do not attempt approach the area below the epicenter. Cover your skin, your mouth and your nose to protect from the fallout and try to get away. Preferably in the direction the wind is coming from but do not approach the epicenter. https://www.youtube.com/watch?v=IKqXu-5jw60