Eibar's La Liga game against Real Sociedad on Sunday has been postponed due to air contamination.
The Royal Spanish Football Federation's competition committee made the decision to call off the fixture due to a landfill fire near Eibar, while all matches in the nearby towns of Ermua and Zaldibar have also been called off.
A letter from the Basque government's deputy minister for health warned against sports activities being performed due to "high levels of chemical compounds detected in the air".
Editors' Picks
The health authorities have also warned citizens of the three towns not to leave their windows open, while a nearby motorway was temporarily closed.