As a blistering heatwave tightens its grip across Europe, with 37 French departments on red alert and an estimated 150 million people sweltering under temperatures exceeding 35 degrees Celsius, the summer holiday dream is colliding with a dangerous reality. Whether you are already baking in a hot destination or preparing to depart, vigilance is no longer optional—it is a survival skill.
For many, sunshine is the very currency of a holiday. But as pharmacist Navin Khosla warned, the extreme temperatures now common in popular tourist spots are a threat many travelers have never faced before. Here is what experts say you must know before stepping out into a heatwave.
The Unforgiving Mistake: Underestimating the Sun
The single greatest error travelers make is a fatal nonchalance. “You can go outside and think it’s not that bad, but the heat can really sneak up on you, especially if you spend a lot of time outdoors and haven’t prepared,” said Melissa Yeager, senior editor at Lonely Planet. Her primary directive is relentless hydration.
Begin the day with a large glass of water. Carry a reusable bottle constantly. Strictly avoid dehydrating drinks like alcohol, and if you indulge in a cocktail, aggressively compensate with extra water. This is grim news for vacationers in Italy: both coffee and the iconic Aperol Spritz are classified as dehydrating agents. Yeager’s golden rule for outdoor activities is to refill your bottle when it is half-empty. If a refill station is nowhere in sight, turn back immediately to avoid a dangerous situation with no water.
Embrace the Indoors to Save the Outdoors
There is a pervasive pressure to be outside constantly while on holiday, but this instinct must be suppressed during extreme heat. “It’s important to spend a few hours a day inside, or at least in the shade,” advised Huw Owen, co-founder of a holiday planning platform. He insists on checking the weather forecast religiously and structuring the day around it.
Midday and late afternoon are typically the most brutal hours. Yeager recommends limiting outdoor exposure during this window. Instead, pivot to museums, cinemas, indoor meals, or even a restorative siesta. Galleries offer a double benefit of air conditioning and cultural enrichment. For dedicated sunbathers, the beach should be reserved strictly for the late afternoon.
Abandon the Tourist Checklist
In a heatwave, ambition is the enemy of well-being. “Be kind to yourself,” Yeager urged. The compulsion to check off every landmark and tourist site will only lead to exhaustion and deprive you of simpler joys. “Spending time eating ice cream and people-watching in an Italian café can be just as enriching as visiting multiple tourist sites,” she noted.
This advice is critical for parents feeling the weight of creating perfect memories. Children are often just as happy in a swimming pool as they are on a forced march to a monument. Swapping a grueling itinerary for an afternoon at the pool is not a failure; it is a strategic retreat.
Swap the Lie-In for a Siesta
Vacations are for rest, but sleeping in can rob you of the only tolerable hours for exploration. The coolest parts of the day are early morning and late evening into the early hours. Experts suggest reserving these windows for walks and sightseeing. This may mean less sleep at night, but it should be compensated with a scheduled siesta during the peak heat. This rhythm not only boosts energy for nightlife but is also a health-conscious adaptation.
The Body’s Warning Signals Are Not Optional
Perhaps the most dangerous mistake is psychological denial. “The most common mistake is not being honest with themselves about how they feel,” said cardiologist Gregory Katz. “They think they are on a trip, and to be able to do everything they want, they can ignore the strange sensations their body is sending them.”
These signals are a critical alert system. Dr. Katz advises constant self-monitoring throughout the day, especially for those with chronic illnesses. Travelers must honestly assess their risk profile, considering medications and overall health status. Those in higher-risk categories must exercise extreme caution and listen intently to their body’s limits. In a heatwave, pushing through is not a sign of grit; it is a gamble with fatal consequences.
