Overview
- UK guidance urges people to go indoors quickly and shelter in the centre of a building, away from external walls and windows.
- Officials advise switching off fans and air conditioning and sealing doors, windows and vents to limit radiation exposure.
- Buildings made of brick, stone or concrete provide the best protection, though being inside any structure is safer than remaining outside.
- People may be asked to stay indoors for one to two days and to follow updates from official channels, with evacuation only if specifically directed.
- Coverage cites experts who say survival near a detonation is unlikely and that substantially lower radiation risk is typically found roughly 10 to 20 miles from ground zero.