Protect the light routine a canary lives by
A canary's calm depends on light more than on quiet alone, because day length and steady light-dark cycles drive its singing, moult and rest. During a storm, keep your canary in its familiar cage in an interior room where lightning flashes are muted by curtains, and keep a gentle lamp on if the sky turns midday-dark, so the bird does not read the gloom as sudden night. Avoid throwing a thick cover over the cage in daytime, which can confuse that cycle and add heat; a light cloth over one end gives shelter to retreat behind while the rest of the cage stays normally lit. Keep the cage where it usually stands if that room is already interior, because an unnecessary move is its own stress.
Read the quiet stress signs canaries actually show
A canary in storm distress rarely screams or thrashes, so the household must know what to watch for. The early signs are silence from a bird that normally sings, sitting fluffed with the head tucked, staying on the cage floor, and leaving seed and greens untouched. A canary that pants with an open beak in a cool room, or one found fluttering weakly at the bars after a night of thunder, needs warmth, quiet and an avian vet's advice once the emergency passes. Note your own bird's baseline — its usual song times, favourite perch and how quickly it returns to feeding — because a change from that baseline is the clearest alarm a quiet species gives.
Keep hands off and the room predictable
Canaries are observation birds, and being caught and held during a frightening storm adds a predator scare to the noise scare. Keep handling to emergencies only, move around the cage slowly, and let one familiar person do any feeding or water change rather than a rotation of worried faces at the bars. Keep other pets out of the canary's room, close the door against sudden hallway noise and alarms where you safely can, and keep voices low and ordinary. If the household must evacuate, take the canary in its own small cage covered with a light cloth, secured so it cannot slide, rather than transferring the bird to an unfamiliar container in a panic. Also keep a spare drinker and a small supply of its usual seed in the storm room itself, because opening doors to fetch supplies during the loudest part of an emergency lets in hallway noise, other pets and draughts that a canary already on edge does not need.
Make sure anyone home knows the canary plan
Canary care fails in emergencies when the person present knows the dog's plan but not the small bird's, because the signs are subtle and the light rules are unusual. Write down the storm room, the lamp and partial-cover approach, the no-handling rule, and your bird's personal stress signs and normal song pattern, and keep that note with its seed and spare drinker. Review it with family before storm season, not during the first thunder. When those canary-specific notes are kept in KinsLe with Family Sharing, every family member helping at home works from the same light, room and stress-sign details instead of assuming a silent bird is a settled bird.