Start with a carrier she does not fear
In an emergency, the carrier is the bottleneck: everything else can be packed in advance, but a cat who vanishes under a bed at the sight of the box can cost you the minutes you do not have. Choose a sturdy carrier that opens from the top as well as the front, since lowering a reluctant cat in from above is far easier than pushing her through a front door, and keep it out in the home as ordinary furniture with a blanket inside. Cats who nap in the carrier voluntarily are cats you can secure in seconds.
Pack the bag for the first stretch away from home
Pack as if you will be away for the first difficult stretch and unable to shop: sealed portions of her usual food, bottled water, a small lightweight litter tray with a bag of litter, waste bags, and a scoop. Her usual food matters, because an emergency is the wrong moment for a sudden diet change on a stressed stomach. Add a familiar-smelling blanket, a spare lead and harness only if she is already trained to one, paper towels, and pet-safe cleaning wipes for carrier accidents, which are common when a frightened cat travels.
Include a recent printed photo of her and written notes on her feeding routine, temperament, hiding habits and any ongoing care needs, in case someone else has to look after her or she is found by strangers. If she takes regular care for an ongoing condition, discuss an emergency supply plan with your veterinary practice in advance rather than improvising one during a crisis, and follow their guidance on what to keep and how to store it.
Keep her records as grab-ready as the bag
Collect copies of the documents an emergency actually demands: vaccination record, microchip number, your contact details, your veterinary practice's address and phone number, and a note of any insurance details you hold. Keep printed copies in a waterproof folder inside the grab bag, because phones die, signal fails and paperwork is what boarding facilities, emergency accommodation and unfamiliar veterinary practices ask for first.
Practise the pickup before it is real
Run short, boring rehearsals. Feed an occasional meal or treat inside the carrier, close the door briefly on an ordinary day, lift the carrier a few steps and set it down again, and occasionally take a very short car ride that ends back home rather than at the vet. You are teaching her that the carrier predicts nothing terrible, so that on the one day it matters she walks in or tolerates being placed in without a chase around the furniture.
Know where you would go with her
An emergency kit is only half a plan; the other half is a destination that accepts cats. Identify in advance a friend or family member outside your immediate area who could take her, and check which local boarding options or emergency arrangements exist, because discovering at midnight that your fallback cannot have pets turns a prepared evacuation into a second crisis. Keep those names and numbers in the same folder as her records.
Review the whole setup whenever her routine changes and at regular intervals through the year, replacing food before it dates and swapping the blanket for one that smells current. The kit earns its place by being boringly ready, and keeping her KinsLe Pet Passport current means the record side of that readiness, vaccinations, chip details and care notes, travels as one packet whenever the carrier leaves the house.