The U.S. Embassy in Cairo is currently able to accept certain emergency filings of immigrant visa I-130/I-600 petitions for immediate relatives of U.S. citizens who are normally resident in the consular districts of Jerusalem, Tel Aviv, and Beirut and have not yet filed an immigrant visa petition with USCIS
What I understood from this is it is for US Citizens with relatives living in the areas mentioned.
OnlyU.S. citizens physically present in Cairo may file at the U.S. Embassy in Cairo for their qualifying spouses, unmarried children under 21, adopted children, and parents who have fled these consular districts.
As for this, it is not mentioned that I must be living in Cairo, only physically present.
Please let me know if my understanding is wrong.