Valencian health authorities issue medium heat-risk alerts for 21 municipalities in Castellón

The Valencian health department issued a medium heat-risk alert on June 22 for 21 municipalities in Castellón, as Spain’s first major summer heatwave pushed temperatures above 37C in parts of the Comunitat Valenciana.

The alert covers towns in the comarcas of El Ports, L'Alt Maestrat and Baix Maestrat. Regional reporting said midday temperatures already exceeded 37C in parts of the region, including Sorita and Vilafamés in Castellón.

Heat risk in Castellón

Cadena SER Radio Valencia reported the alert in the morning of June 22, while broader national coverage described a heatwave affecting much of Spain and activating health warnings across most municipalities. El País reported that the country’s first summer heatwave was producing temperatures above 40C in some areas and putting much of the country under health alert.

The Valencian warning is part of a wider public-health response aimed at limiting heat exposure during the first major heat event of the season. The national alert system is being used alongside regional advisories to flag risk for older people, children and people with chronic conditions.

What happens next

According to the broader forecast reported on June 22, the heat was expected to ease from Wednesday, June 24, first in western parts of Spain and later elsewhere. Heat was expected to linger longer in eastern areas and the Balearic Islands.

For Castellón and the wider Comunitat Valenciana, the key question is whether the Valencian health department updates the alert level or expands the list of affected municipalities if temperatures rise further. Local guidance on outdoor activity, work schedules and cooling measures may also follow if the episode persists.