Read the Beard Before You Act
A bearded dragon announces storm stress on his throat. A beard that darkens to black, puffing, gaping at the glass and repeated glass surfing along the front panel all say the thunder, flashes or household commotion have overwhelmed him. A dragon sitting flattened on his basking spot with a pale beard and half-closed eyes is coping. Learn that difference before the emergency, because the coping dragon needs to be left alone, while the black-bearded one needs his environment changed, not a cuddle tour of the house.
Change the inputs, not his location, first. Cover the side of the enclosure facing the window with a breathable cloth to cut lightning flashes, move a rattling loose object out of the room, and lower household noise near his wall. Bearded dragons key strongly on visual movement, so people repeatedly looming over the top of the enclosure to check on him can sustain the alarm long after each thunderclap fades.
Keep Light and Heat Steady Through Outages
A bearded dragon's calm is tied to his basking routine. If power fails during a storm, his spot will cool and his body will slow, which is tolerable for the length of most outages in a warm house. Do not improvise heat with anything that can overheat a confined lizard or produce fumes indoors, and do not feed him while temperatures are depressed, because his digestion depends on reaching proper basking warmth afterward. A hand warmer outside the glass, wrapped and monitored, is a gentler bridge than any hot object placed inside with him.
When power returns, restore his normal light cycle rather than leaving lights blazing all night to make up for lost hours. A bearded dragon thrown onto a shifted photoperiod by a well-meant all-night lamp often shows more agitation the following day than the storm itself caused. Return to routine, offer water drops on the snout if he will drink, and let appetite find its own way back over a day or two.
One Plan, Followed by Everyone
A bearded dragon in a busy household suffers most from inconsistent mercy: one person covers the glass, another uncovers it to peek, a third lifts him out during the loudest thunder. Agree the storm plan in advance: who checks the beard colour, who controls the cover, and the rule that he is not handled unless the enclosure itself becomes unsafe. Write it where every helper can see it rather than relying on whoever remembers the last storm.
Watch the morning after as carefully as the night itself. A bearded dragon who spent hours black-bearded may refuse breakfast, hide earlier than usual or bask with his mouth open at lower temperatures while his system settles. Those are observations to note and monitor across the day, not emergencies to solve by handling. If the black beard, lethargy and refusal to bask persist into a second full day, or he was injured by anything falling in the enclosure, that is the point to call a veterinarian rather than waiting out another night.
That written plan works best where the whole household already looks for his care details. Placed on KinsLe with Family Sharing, his profile carries the storm steps beside his feeding and lighting notes, so a grandparent, teenager or neighbour helping during the emergency follows the identical routine you would, and your bearded dragon meets one calm, predictable response instead of five different ones.