Petrels represent the most endangered avian group globally. Beyond the pressures of invasive mammal predation and fisheries bycatch, these seabirds face an escalating emerging threat: anthropogenic light pollution. During their initial nocturnal dispersal from the colony to the sea, fledglings are disoriented by artificial illumination. These 'grounding' events expose them to a suite of secondary threats, resulting in significant mortality. This study analyzes rescue data for three species in the Balearic Islands: the Balearic shearwater, Scopoli’s shearwater, and the European storm petrel. While the recorded grounding rate represented less than 1% of annual reproductive output, the trend is concerning. Given ongoing urban expansion, the intensification of light pollution near breeding colonies must be factored into conservation strategies to mitigate this avoidable source of mortality.