The best first option: a warm home with people she knows
A Devon Rex who must leave home suddenly does best in the home of a friend or family member she has already met. This breed bonds intensely, follows people from room to room, and seeks out laps and warm shoulders, so familiar humans matter as much as the building. Ask for one warm, secure room rather than the run of the house: her carrier and blanket in a corner, litter tray across the room, food and water away from the tray. A single room also protects a curious Rex in an un-cat-proofed house, because she will investigate shelves, laundry piles, and any warm appliance within the first hour.
Boarding facilities and vet boarding as the reliable backup
When no familiar home is available, a licensed boarding cattery or your vet's boarding service is the safe choice for a Devon Rex. Book the warmest style of accommodation they offer and ask directly where she will sleep, because her short wavy coat leaves her chilled in a draughty pen that a longhaired cat would tolerate. A good facility will accept her own blanket and food, keep her feeding schedule, and give her daily handling, which this breed actively needs. Vet boarding adds reassurance if she has any ongoing care routine, since the staff handling her are the people who already know her file.
What a host needs to know about Rex behaviour
Whoever houses a Devon Rex should be warned about three breed truths before you leave. She seeks heat single-mindedly and will burrow into bedding, laundry, and laps, so hosts should check before sitting down and before running a wash load. She is an agile jumper with a mischievous streak, so breakables and open windows are genuine risks, not formalities. She is vocal and social enough that silence from her room is more worrying than noise; a Rex who stops calling, stops eating, or hides continuously for more than a day should prompt a call to you and then to your vet. Warmth, company, and one closed door solve most of it.
Options that do not suit this breed
Leaving a Devon Rex alone in your home with once-a-day drop-in visits is the weakest arrangement for this particular breed, however well it works for independent cats. She will spend the absence cold under a blanket, lonely, and increasingly frantic at the door, and a burst pipe or failed heater in an empty house becomes her emergency with nobody present. A house full of strangers, such as a busy short-stay rental swap, is nearly as poor a fit; the traffic and door activity invite an escape. If a sudden departure means you cannot brief anyone properly, boarding with professionals beats improvising with whoever happens to be free.
Settling her in the first hour
The first hour decides how a Devon Rex experiences the whole stay. Arrive with her carrier, her own bedding, her usual food, and a worn item of your clothing, and set up her room completely before opening the carrier door. Sit with her while she explores, then leave quietly during a meal or a nap rather than staging a long goodbye. Tell the host her feeding times and where she likes to sleep in writing, not conversation. Giving that host a KinsLe Care Pass for the stay puts her routine, warmth needs, and key details in their hands for exactly as long as they are caring for her.