Terror attacks where we have to move on quickly.
I live near as in at the end of the runway a major airport hub in the Middle East. Slightest hint of an actual issue anywhere in the country, I'll grab the clutch bag that's in my safe, which is in the under stairs cupboard by the door, and be off. We also have a tent in the boot of the car and plenty of water if air travel isn't an option, and a friend whose boat is moored nearby and well stocked.
My grab bag includes passports, UK driving licenses, a few grands worth each of euros and U.S. Dollars, birth certificates and marriage certificate.
I also have a pashmina that lives in te car and a jumper, so I have a makeshift headscarf Incase the need to be fully covered (like if I somehow end up in Saudi, or Islamic militants take over - may help me last that little longer till I can get away).
The biggest problem would be the pets - fine if we need to get in a car or on a boat, not so fine if we need to get on a plane. Id be utterly devastated, and I know I sound heartless I'm nice really but human survival is key.
My safe is also 2 hours fire proof. So all documents should be ok in case of fire. The building is fully sprinklered so should be controlled easier, but I'm happier that my passport is in a fire proof safe
My freezer and tin cupboard is also stocked for in case there is any type of embargo on imported products, or we get cut off due to flight/airport attacks. The country produces very little of its own food, so this is definitely possible. We could go, I reckon, 4 weeks on the stocks in the house. It'd take a lot for something to last that long and for us to be stuck here and not evacuated by the foreign office.
I'd also say to other expats - make sure your details are up to date with your embassy, so try can contact you in case of troubles. I'm not sure how much that would actually help, but it makes me feel safer that my address and contact details are logged so someone will be looking for me.