Record-breaking heat wave causes hundreds of deaths, sparks wildfires across Italy and Balkans

A deadly heat wave that began June 20, 2026 has caused at least 1,000 excess deaths in France alone and sparked widespread wildfires across Italy and the Balkans, with scientists attributing the event to human-caused climate change. The heat wave set early summer records with temperatures 8-10 degrees Celsius above average, prompting red alerts in 22 Italian cities and tourist destinations across Croatia including Zagreb, Split, and Dubrovnik. Healthcare systems were overwhelmed, with Paris funeral homes unable to handle the volume of bodies, mostly older victims.

Record heatwave excess deaths

• ▪The heatwave that began on June 20, 2026 set records for early summer across Italy and the Balkans
• ▪France reported 1,000 excess deaths blamed on the heatwave that began on June 20, 2026
• ▪The heatwave that began on June 20, 2026 disrupted power generation, damaged infrastructure and overwhelmed healthcare systems

Mediterranean wildfire outbreaks

• ▪Albania contained a wildfire that consumed many hectares of bushes and olive trees near the southern village of Klos over the weekend of June 27-28, 2026
• ▪Dozens of firefighters, assisted by four aircraft, battled a wildfire burning pine forests on the tourist island of Vis in the Adriatic Sea, some 34 miles southwest of Split, Croatia

Climate change attribution study

• ▪The heatwave that began on June 20, 2026 would have been virtually impossible without human-caused climate change, according to scientists
• ▪Human-caused climate change made the June 2026 heatwave's soaring night-time temperatures 100 times more likely than they would have been just two decades ago, according to scientists

Heat-related fatalities across Europe

• ▪Two boys aged 8 and 10 from Bulgaria were found dead in a hot car in Cyprus on June 28, 2026
• ▪Cyprus was experiencing temperatures of around 38 degrees Celsius on June 28, 2026, which is not classified as a heatwave on the east Mediterranean island for the time of year
• ▪Two cyclists, a 30-year-old and a 71-year-old, died while taking part in an event in the Poland Bike Marathon series in Marki near Warsaw on June 28, 2026
• ▪Pope Leo delivered his Angelus message from a balcony to the crowd below on the Feast of Saints Peter and Paul, a holiday in the city of Rome
• ▪Pilgrims at the Vatican used fans to cool themselves and sheltered under umbrellas for shade on June 29, 2026

Future temperature forecast warnings

• ▪Luca Mercalli, the president of Italy's Meteorological Society, said temperatures were set to soar again from July 5 or 6, 2026
• ▪Croatia's weather service issued a red alert on June 29, 2026 for regions including the capital Zagreb and the tourist destinations of Split and Dubrovnik
• ▪Daniele Mocio, a meteorologist with the Italian Air Force, said the heatwave was expected to persist for a few more days in central and eastern Europe, with temperatures running 8-10 degrees Celsius above average
• ▪22 cities in Italy from Bolzano in the north to Palermo on the southern island of Sicily were covered on June 29, 2026 by a red heat warning
• ▪Serbia's State Hydrometeorological Service warned temperatures would reach 39 degrees Celsius (102 degrees Fahrenheit) on June 29, 2026

US Independence Day heat

• ▪The National Weather Service warned of dangerous heat with temperatures in the 90s and lower 100s degrees Fahrenheit across much of central and eastern U.S. in the days before July 4, 2026
• ▪July 4, 2026 marks the 250th anniversary of the Declaration of Independence

Perspective of Italian meteorologists

• ▪Luca Mercalli of Italy's Meteorological Society predicted temperatures would soar again from July 5 or 6, 2026 affecting France, Spain, Germany, Italy, Switzerland and Britain