Israel has been divided into ten "siren" areas. In case of emergency alert of an approaching missile, a one-minute rising-and-falling siren will be sounded throughout the country. As the threat is deemed to have passed, the various areas will be notified. Those in Area Aleph (Tel Aviv and environs), for instance, might be informed that it is safe to take off their masks and leave their sealed rooms at the same time that those in nearby Area Zayin (Netanya) must await further instructions. Northern Israel is Area Daled, except for Haifa and Acco, which are Area Bet. Northern Shomron is Area Heh, while southern Shomron, Jerusalem, and Judea are Area Gimmel. Ashdod and Ashkeon are in Area Chet, while southern Israel is divided into three parts: Be'er Sheva and westward is Vuv; Dimona, Arad, and southward are Tet, and the rest, including Eilat, is Yud.
The codes that will be sounded over the radio in case of an attack:
Homat Barzel (Iron Wall): Country-wide alert.
Adon Leon (Mr. Leon): Alert in Areas Aleph, Bet, and Zayin, as well as Dimon and Arad.
Baal Teshuvah (Repentant): Country-wide alert, including Dimona, except for Ashdod and southwards and the northern areas.