The Spanish government will send convoys carrying the COVID-19 vaccine and food supplies on Monday to areas cut off by Storm Filomena which brought the heaviest snowfall in decades across central Spain and killed four people.

Across central Spain, over 600 roads were affected by the rare blizzard and hundreds of travellers were stranded at Madrid's Barajas airport, which closed on Friday but will reopen gradually later on Sunday.

Forecasters warned of dangerous conditions in the coming days, with temperatures expected to fall to up to minus 10 Celsius (14 Fahrenheit) next week and the prospect of snow turning to ice and damaged trees falling.