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1. Avoid Looking at the Flash
A nuclear detonation produces an extremely bright flash of light. Looking directly at it can cause serious eye injury, even from a distance.
- Turn away immediately
- Cover your eyes if possible
- Drop to the ground and seek cover
It’s also important to stay away from windows, as strong shockwaves can shatter glass and create hazards indoors.
2. Get to Shelter as Quickly as Possible
After the initial flash, a powerful shockwave may follow within seconds. The best action is to find shelter immediately.
- Go inside the nearest sturdy building
- Head to a basement if available
- If no basement is present, move to the center of the building, away from windows and exterior walls
Solid materials like concrete and earth provide better protection. The goal is to put as much distance and shielding as possible between you and the outside environment.
3. Reduce Exposure and Stay Inside
Once you are safely indoors, remain there. The period shortly after the event is the most critical.
- Remove outer clothing to reduce potential contamination
- Wash exposed skin with clean water if available
- Close windows, doors, and ventilation systems if possible
Remain sheltered for at least 24 hours, or until official guidance indicates it is safe to leave.
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