PARIS >> Europe sizzled in its first major heat wave of the summer Tuesday, as Barcelona recorded its hottest June in over a century and the summit of Paris’ iconic Eiffel Tower was closed to visitors.

Health warnings remained in effect in several countries. The abnormally hot weather “is exposing millions of Europeans to high heat stress” with temperatures more typical of July and August, said Samantha Burgess of the European Center for Medium-Range Weather Forecasts.

Spain: Record temps

Barcelona’s Fabra Observatory reported an average temperature for last month of 78 F, breaking records since the data began in 1914. It said a single-day high of 100F for June was recorded Monday. Barcelona is usually spared the worst heat in Spain, thanks to its location between hills and the Mediterranean.

Ramón Pascual, a delegate for Spain’s weather service in Barcelona, told The Associated Press the “very intense heat wave” is clearly linked to global warming.

Pascual said inhabitants of the Mediterranean region are not being helped by the rising sea temperatures, which greatly reduce any cooling effects of a nearby body of water. Spain’s weather service said recent surface temperatures for the Mediterranean near the Balearic Islands are 5 to 6 degrees Celsius higher than average.

Spain’s national average for June of 74F was 1.5F hotter than the previous hottest June in 2017.

Madrid was forecast to reach 102F.

“We’re just surviving,” said Miguel Sopera, 63. “At night it’s impossible due to the terrible heat.”

France: Closed schools

Temperatures were forecast to reach 104 degrees Fahrenheit in Paris. National weather agency Météo-France placed several departments under the highest red alert. More than 1,300 schools were partially or fully closed.

Visitors to the Eiffel Tower without tickets were told to postpone their visits as the summit was closed until Thursday for “everyone’s comfort and safety.”

Climate experts warn that future summers are likely to be hotter than any recorded to date, with temperatures exceeding 40 degrees Celsius expected every year by 2100.

Italy: A blackout

Italy’s health ministry said 17 of the country’s 27 major cities were experiencing a heat wave.

In Florence, where temperatures reached 100 F on Tuesday, parts of the city center experienced a blackout following a surge in electricity demand. Backup systems restored power, energy company Enel said.

Near Bologna, the 46-year-old owner of a construction company collapsed and died while repaving a school parking lot, state-run RAI reported. An autopsy was being conducted but heat was suspected.