Presumably you have evacuated by then. There is more info available here: https://www.nrc.gov/about-nrc/emerg-preparedness/about-emerg-preparedness/potassium-

Presumably you have evacuated by then. There is more info available here: https://www.nrc.gov/about-nrc/emerg-preparedness/about-emerg-preparedness/potassium-iodide/ki-faq.html#kiexpired https://www.nrc.gov/about-nrc/emerg-preparedness/about-emerg... and here, about dosing: (pdf warning) https://www.fda.gov/media/72510/download https://www.fda.gov/media/72510/download