We estimate the effect of hydro-meteorological emergencies on internal migration in Costa Rica during 1995–2000. We find that, on average, emergencies significantly increase average migration. However, we also find that emergencies with the most severe consequences, those with loss of lives, decrease migration. The severity of the consequences may explain the differences in the sign of the effect in previous research. We also find that emergencies significantly increase population in metropolitan areas. Less severe emergencies significantly increase migration toward metropolitan areas. More severe emergencies significantly decrease migration toward non-metropolitan areas.