I would take a carry on size backpack, which is preferred mode, even in non-emergencies. In it I would have a change of clothes, an appropriate garment for inclement weather, toiletries, a small versatile FAK, some food and snacks (no cooking), any unique/irreplaceable items, knife (normally Leatherman Wave) and matches if possible, and a filled canteen. As much as possible would be worn on my person or in my vest and coat. This would include EDC items like a small flashlight, whistle, keys. When travelling I usually wear a money belt and cash stashed in various locations. Don't forget the passport.

From the news reports, it is a major hassle getting to the Cairo airport. I would seek guidance from the embassy or trusted friends.

"We'll always have Paris"....