Unseasonal heat is sweeping across Europe, shattering temperature records. The United Kingdom recorded its highest temperature in May on Monday. Government warnings have been issued following reported deaths at amateur sports events in France.

France’s sports minister, Marina Ferrari, expressed condolences to the family of a runner who died during a Paris race on Sunday. According to Le Parisien newspaper, the 53-year-old man experienced a heart attack in the capital’s 20th arrondissement. Firefighters were unable to revive him. While the cause of death has not been confirmed as heat-related, Ferrari has suggested a potential link. On that afternoon, Paris temperatures reached 32°C (90°F).

“The incidents today during running races remind us that extreme heat demands caution during physical activities,” Ferrari commented on social media. She extended her sympathy to the runner’s family and to those treated by emergency services.

In Lyon, another heat stroke-related death occurred during a sports event on Sunday, reported by local media Actu Lyon.

Meteo France, the national weather service, announced record-breaking temperatures for May, surpassing 30°C (86°F) in many regions. This heat is expected to persist throughout the week.

The U.K. recorded a temperature of 34.8°C (94.6°F) at Kew Gardens in southwest London. This surpassed the previous record of 32.8°C (91.4°F) set in 1922 and equaled in 1944.

Beaches and parks were crowded as residents and tourists sought shade and relief. The U.K. Health Security Agency released its first amber health alert this year, highlighting the increased risk of deaths, especially among the elderly, during peak heat times.

Experts suggest extreme weather linked to Earth’s warming is occurring more often. Unprecedented and lethal weather extremes at unconventional times are increasingly putting people in harm’s way.