Solitary, Nocturnal, and Easily Overwhelmed
A pet hedgehog meets disturbance by curling into a spined ball and waiting for the world to go away. Fireworks deliver the disturbance in layers he cannot escape: concussive bangs felt through the cage floor, flashes in a room he expects to be dark, and — because he is nocturnal — it all lands exactly when he is waking up and most active. His hearing is far more sensitive than yours, so a display that sounds distant to you can be intense at cage level.
Unlike a social pet, he gains nothing from company or cuddling through it. The kindest fireworks plan for a hedgehog is mostly about changing his environment and then leaving him to his own defences.
Hold His Temperature and Routine Steady
Hedgehogs kept as pets need a consistently warm room, and stress plus a temperature dip is a dangerous combination — a hedgehog who gets chilled can attempt a hibernation response that pet hedgehogs handle badly. Before fireworks night, check that his usual heat source is working, the thermometer reads in his normal range, and the cage is not being moved to a cooler spare room for the sake of quiet. A slightly noisier warm room beats a silent cold one for this species.
Feed him at his usual time, keep his water as normal, and leave his wheel in place. Many hedgehogs will simply stay balled or hidden during the worst of the noise and then run and eat later at night once it settles; that delayed routine is a perfectly good outcome.
Fleece, Darkness, and a Closed Door
Put his familiar hide — ideally the fleece pouch or house he already sleeps in, carrying his own scent — in its usual spot, and add an extra fleece layer he can burrow under. Close the curtains or cover the window to cut the flashes, keep the room door shut so dogs and curious visitors stay out, and avoid switching bright lights on and off around him.
Skip any cage deep-clean that day, and do not use the evening as a chance to introduce a new hide, new bedding material, or a new food. For a hedgehog, novelty itself is a stressor to schedule on an ordinary night instead.
Read the Ball Correctly
A tightly balled, hissing, or clicking hedgehog is not being difficult; he is at maximum defence and further poking only prolongs it. Do not try to uncurl him to check he is all right during the display. Watch from outside the cage: breathing continues under the spines, and most hedgehogs loosen, unball, and head for food once the room has been quiet and dark for a while.
If household members want to help, give them the observation jobs — noting when he uncurled, whether the wheel turned overnight, whether food disappeared — rather than handling jobs.
When to Worry Afterwards
Check the following evening that he has eaten, drunk, and used the wheel, and look for wobbliness, unusual lethargy during his active hours, cold belly, or complete refusal to unball long after the house is calm. Those signs — especially any hint of attempted hibernation or not eating through a full night — warrant a prompt call to a vet experienced with hedgehogs, because this species deteriorates quietly.
His care details are easy to get wrong from memory, so KinsLe Family Sharing keeps your hedgehog's profile, temperature needs, and quiet-night routine in front of everyone who helps with him, all working from the same information on fireworks night and every night.