"Flash Burns" as the radiated light spectrum from the initial detonation, prevention roll down your sleeves, put on a jacket (not plastic nor nylon, those will melt and stick to your skin, DO NOT WEAR BLACK OR DARK AS LIGHT ABSORBING CLOTHING, white would be best to reflect light), face away from the direction of the target, DO NOT "LOOK" when you hear the detonation or you will be permanently blinded retinal burns, plug you ears with your fingers if you do not have hearing protection, open your mouth and breath normally or the intense "Overpressures" will result in serious injuries.

After Detonation, there will be a "Supersonic Rollling Blast Wave", like a Tsunami on land,  after this passes DO NOT LEAVE YOUR SHELTER, there will be another "Rolling Blast Wave" going back towards the direction of the Detonation, and a huge vacuum as the opposite of the large "Overpressures" created by the Detonation.  Both depending on distance are capable of throwing tons of debris.

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