What Happens If America Is Hit by a Nuclear Attack? Iran-USA War

What Happens If America Is Hit by a Nuclear Attack? In January 2018, every phone in Hawaii buzzed with the words "BALLISTIC MISSILE THREAT INBOUND… THIS IS NOT A DRILL." It took 38 minutes to tell people it was a mistake. So what if it hadn't been? We walk through it step by step, like scientists: who could launch an attack, the first minutes inside the command centres, how the warning reaches your phone, the flash, the cloud, the shelter, the invisible weapon in the sky, how the country keeps running, the days after, and what you can actually do today. 0:00 The question 1:29 Who could do it? 3:04 The first minutes 4:50 The warning reaches you 6:04 The flash 7:59 The cloud 9:35 Get inside, stay inside 11:47 The invisible weapon 13:30 Keeping the country running 15:04 The days after 17:10 A few missiles 18:09 The nightmare 19:46 How close have we come? 21:29 The answer A note on the facts: no one can say exactly what an attack would look like. The damage zones in this video are the published FEMA and CDC planning examples for a 10-kiloton weapon; real effects depend on the weapon, the weather and the city. Warhead counts are public estimates, and the maps and city plans are illustrative. Up to date as of November 6, 2026. WHAT TO DO (official US guidance): Get inside, stay inside, stay tuned. Go to the middle of a sturdy building or a basement, stay there at least 24 hours unless told otherwise, and follow official updates. More at ready.gov. SOURCES USED Hawaii Emergency Management Agency false missile alert, Jan 13, 2018; FCC report, Apr 2018 FEMA, Planning Guidance for Response to a Nuclear Detonation (3rd ed.); Nuclear Detonation Response Guidance (2023); Ready.gov CDC Radiation Emergencies: 10 kt damage-zone example; decontamination guidance FEMA / Lawrence Livermore 10 kt Washington scenario (AP, Mar 2012) Stanford CISAC (Wein & Brandeau): sheltering vs evacuation after a 10 kt detonation FAS Nuclear Notebook / SIPRI Yearbook 2026: warhead estimates Missile Defense Agency; Atlantic Council (2026); CBO (May 2026) Golden Dome estimate New START expiry, Feb 5, 2026 (AP) Bulletin of the Atomic Scientists: Doomsday Clock, 85 seconds to midnight (Jan 27, 2026) Starfish Prime, Jul 9, 1962: effects in Honolulu Xia et al., Nature Food (2022): nuclear war and global famine False alarms: NORAD training tape (1979), Stanislav Petrov (1983), Norwegian rocket (1995) Presidential Succession Act of 1947; E-4B "Nightwatch" PHOTOS (Wikimedia Commons) Cheyenne Mountain Complex entrance · Public domain Ground-Based Interceptor emplacement · Missile Defense Agency · Public domain "Duck and Cover" (Bert the Turtle) · Public domain Starfish Prime aurora from Honolulu · Public domain E-4B Nightwatch refuelling · US Air Force, Senior Airman Christopher Campbell · Public domain Reagan and Gorbachev at Geneva, 1985 · White House Photographic Office · Public domain Minuteman III test launch, 2025 · A1C Jack Rodriguez Escamilla, USAF · Public domain Fallout shelter sign, Baltimore · Japs 88 · CC BY-SA 4.0 B-52 Stratofortress takeoff · Trevor MacInnis · Public domain Hiroshima Peace Memorial Park · lumoplank · CC0 Maps: terrain from Mapzen Terrain Tiles (AWS Open Data); borders from Natural Earth; satellite imagery NASA Blue Marble. The Answer Lab · Every day, one big question. #TheAnswerLab #NuclearWar #America