Pick the Room That Swallows Sound Best
Choose the room in your home that is furthest from the street and the neighbours' gardens, ideally one with no external wall facing the displays, thick curtains, and a door that closes properly. Interior bathrooms and hall-adjacent bedrooms often work well; rooms with large windows, conservatories, and extensions facing the noise work badly. Move her essentials into that room well before dark: bedding, water, food if she will eat, and a litter tray placed as far from the bedding as the room allows, because a frightened cat will not cross a scary open floor to reach a tray in another room, and accidents then add to everyone's stress.
Make a Den Inside the Room, Not Just a Room
Most cats cope by hiding in a small, covered, enclosed space rather than sitting in an open room, so give the refuge a heart: a sturdy box with a cat-sized entrance cut in the side, a carrier with its door fixed open, or a space under a bed screened with a blanket. Line it with bedding she already sleeps on, since familiar scent is calming in a way fresh blankets are not, and add an item of your worn clothing. Face the entrance toward a wall so she feels hidden from the room as well as from the noise, and resist making it prettier at the cost of making it more open.
Let Her Discover It on Calm Days First
A refuge introduced during the first explosion is just another new, suspicious thing. Set the den up days ahead and let her find it herself, perhaps with a favourite treat appearing inside it on ordinary evenings, so by the noisy night it is already hers. Keep the door routine normal too: if she usually has the run of the house, shutting her in one room for the first time on fireworks night can panic her more than the bangs. Some cats prefer to choose their own bolt-hole under a bed or behind a sofa; if she has a proven favourite, strengthen that spot with bedding and accept her judgement over your floor plan.
Manage Sound, Light, and Your Own Behaviour
Close windows and curtains before the fireworks begin to blunt both the bangs and the flashes, and put a radio or television on at a modest volume in or near the refuge room to smooth the contrast between silence and explosion. Stay calm and unhurried yourself, because cats read their people's tension closely; sit nearby if she wants company, talk quietly, and let her come to you rather than pulling her out for a cuddle she has not asked for. Never punish hiding, crying, or an accident, and keep children and visitors from reaching into the den to extract her for a look.
Give Everyone in the House a Job
Fireworks nights go wrong at the edges: a front door opened to a trick-or-treater, a window left ajar, a dog let into the refuge room. Agree beforehand who closes up the house, who checks the den, who keeps doors shut, and who stays with her, so nothing depends on memory in a noisy, distracted evening. Writing those jobs down where the household shares her care means a partner, teenager, or visiting grandparent follows the same plan. With KinsLe's Care Teams, each fireworks-night duty can be assigned to a named person per pet and ticked off with a timestamp as it is done.