Settle the Cornish Rex indoors before the noise starts
A Cornish Rex stays safest during fireworks when she is already indoors, fed, and settled before the first bang arrives. Bring her in early, close and latch windows, draw curtains against flashes, and shut doors to rooms with chimneys, vents, or other gaps a slim cat can probe. The Cornish Rex is slender and fine-boned with very little coat, and a frightened one can squeeze through a surprisingly small opening while hunting for cover. Do a deliberate round of the house: laundry room vents, loose screens, and the gap behind appliances all deserve a check before the evening begins.
Warmth and cover matter more for this breed
Warmth and cover calm a Cornish Rex in a way that matters more than for a thick-coated cat. With only a soft wavy undercoat, a Rex loses heat quickly and feels exposed, and stress makes that worse. Build the safe room around a covered bed or a box lined with familiar bedding, add a wrapped source of gentle warmth she can lean against or leave, and let her burrow rather than sit in the open. A worn item of your clothing in the bed adds your scent. Resist picking her up repeatedly to comfort her; for a Rex pressed against a warm surface in a den, stillness and your nearby presence soothe better than being carried.
Sound, light, and routine inside the safe room
The safe room for a Cornish Rex should blunt both the bangs and the flashes that come with fireworks. Keep a television or radio playing at ordinary volume, run the evening as normally as the noise allows, and place litter, water, and a small meal inside the room so she never needs to cross the house mid-display. Expect appetite to dip and hiding to deepen at the loudest peaks; that is a normal stress response in a sensitive, people-attached breed. Avoid opening the room door to show guests the cat, because a Rex who bolts past legs in a panic is exactly how fireworks night escapes happen.
Identification and the escape plan, arranged in advance
Identification is the Cornish Rex safety net if a door beats your precautions. Check that her collar and tag are secure and that her microchip registration carries your current phone number, and keep a recent clear photo ready on your phone, showing the wavy coat and face markings that make her recognisable. Tell everyone in the house the rule for the night: exterior doors opened one at a time, and the cat's room stays shut. If she does get out, search quietly nearby with a torch once the display ends rather than calling loudly during it, since a hiding Rex responds better to a calm familiar voice.
After the last bang, let her set the pace
A Cornish Rex may stay in her den well after the fireworks finish, and the household should let her emerge on her own schedule. Offer water and a small meal, leave the warm bed in place overnight, and check her over gently for any injury if she squeezed somewhere tight. Appetite and sociability usually return by morning; a Rex who still refuses food, breathes fast at rest, or cannot settle the next day deserves a vet call. Recording what worked this time makes the next noisy night easier to plan. Should she ever slip out despite the closed doors, KinsLe Lost Pet Alert System can alert nearby members while a finder messages you directly.