Introduction Latin America and the Caribbean (LAC) is one of the regions most affected by the climate crisis, which is connected to international migration through a complex nexus. During the last years, migratory flows on the continent have increasingly included children and adolescents who are migrating through non-authorised crossing points. The existing literature shows how inequities negatively affect migrant children and the role that healthcare systems can play to mitigate them.Objective Based on a qualitative study, the paper aims to analyse the role of the climate crisis on the healthcare needs of migrant children from LAC who are currently living in Chile, from the point of view of parents from five main countries of immigration in Chile and healthcare professionals.Method An exploratory study was conducted in Arica, Antofagasta and Santiago. In-depth interviews with 20 migrant parents and 20 healthcare professionals were carried out. The interviews were transcribed verbatim and a thematic analysis was performed.Results Three findings emerged from this study: (1) food insecurity affects LAC migrant children in their country of origin and during their migratory trajectories to Chile, (2) natural disasters and environmental degradation in the countries of origin are not the only drivers of migration for LAC families but also prevent returns, even when they remain undocumented and (3) LAC migrant children are exposed to urban pollution and contaminants in informal settlements due to difficulties in accessing formal housing, among others.Conclusions The climate crisis must be integrated into the study of migrant health in LAC, considering the current context of multiple political, health and economic crises in the region. Healthcare professionals and communities play a central role in creating interventions to build sustainable and resilient universal healthcare systems.