A man died from burns and thousands of people were forced to flee as wildfires, fuelled by strong winds during a searing heatwave swept through parts of Spain on Tuesday.

The victim suffered serious burns as winds of up to 70 kilometres per hour whipped the flames through Tres Cantos, a wealthy suburb north of the capital Madrid, officials said.

He later died in hospital, in the first fatality from dozens of wildfires to have hit the country since the heatwave began last week.

The head of the regional government of Madrid, Isabel Diaz Ayuso, said she "deeply regretted" the man's death in a message on X.

Hundreds of residents in Tres Cantos were evacuated from their homes.

But on Tuesday morning, regional officials said the blaze had been contained.

Elsewhere, about 2,000 people were evacuated from hotels and homes near the popular beaches of Tarifa in the southern region of Andalusia.

The wildfire broke out near where a similar blaze forced evacuations earlier this month.

The wildfires coincide with what meteorologists expect to be the most intense day yet of the ongoing heatwave, with all regions under weather alerts.

Forecasters warn of highs around 40 Celsius and overnight lows that remain above 25 Celsius.