"As the specter of World War III looms with tensions rising, FEMA has stepped in with a guide to surviving a nuclear attack
FEMA: get inside, stay inside, and stay tuned. Initially, individuals should seek shelter in the nearest building, remove any contaminated clothing, and position themselves as far away from windows and walls as possible, ideally in the basement or middle of the structure.
Remain indoors for at least 24 hours"
https://www.the-express.com/news/us-news/155746/fema-issues-updated-nuclear-attack-survival-steps-world-war-3-fears-intensify