France has decided that mixing record-breaking heatwaves with mass alcohol consumption is a recipe for disaster, not a party. The government has banned alcohol at some events during the annual Fête de la Musique celebrations, as a heatwave pushes temperatures toward historic highs.

The Fête de la Musique, which draws millions to the streets across France, is typically a celebration of summer solstice and music. But with red heatwave alerts issued for 35 of France's departments, the office of Prime Minister Sébastien Lecornu announced: "For all events organised by the state and its agencies, instructions have been given not to offer alcohol."

Temperatures are expected to hit 39C-40C on Sunday, from the southwest through the Paris region into Burgundy, with some areas possibly reaching 41C. Forecasts predict the peak on Monday, and authorities warn it could match historic highs.

The government's rationale: curbing alcohol consumption "to preserve emergency and healthcare services and allow medical staff to focus on caring for the most vulnerable." Because nothing says "summer fun" like overwhelming the healthcare system with dehydrated, sunstroke-afflicted revelers.

The heatwave has already disrupted the country, forcing the cancellation of dozens of trains and the suspension of classes. Météo-France, the national weather service, said it was "uncertain" how long the heatwave - estimated to affect about three-quarters of the population - would last. To help Parisians and tourists cope, authorities are keeping parks and gardens in the capital open through the night.

The Fête de la Musique, now over 40 years old, is always held on the summer solstice. Last year, about two million people attended events in Paris alone - presumably not all of them sober, but this year, the government is taking steps to ensure they stay that way.