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Which Countries Have Extreme Heat Alerts for Travellers?

Which Countries Have Extreme Heat Alerts for Travellers?

If you are planning a holiday during the summer, you have probably seen news stories about heatwaves across Europe and other popular travel destinations. Temperatures have reached record highs in recent years, leading many countries to issue official heat alerts to help protect both residents and visitors.

If you are travelling with children, older family members, or someone with some health conditions, it becomes even more concerning, as they are more vulnerable, making it even more crucial to understand what these alerts mean and which destinations are most likely to issue them.

Take a look at some of the countries that commonly issue extreme heat alerts, whether you should cancel your trip, and what you should do if a heat alert is in place during your holiday.

Image: A photo of an extreme heat warning sign reading “CAUTION! EXTREME HEAT DANGER” standing on dry, cracked land, with a bright sun and hills in the background.

What Is a Heat Alert?

A heat alert is an official warning issued by a country's weather or public health authorities when temperatures are expected to become unusually high and could pose a risk to people's health.

Different countries use different warning systems. Some use colour-coded systems, while others issue public health advisories or emergency weather alerts. The exact system varies, but the goal is always the same, which is to encourage people to take extra precautions during periods of extreme heat.

Heat alerts are not designed to discourage travel. Instead, they help residents and visitors prepare for the weather and reduce the risk of heat-related health issues.

Europe

Many European countries now issue official heat alerts during the summer, particularly between June and August. Countries that have been reported to issue heat warnings often include:

  • Spain
  • Italy
  • Greece
  • Portugal
  • France
  • Croatia
  • Cyprus
  • Malta

These countries often experience temperatures above 35°C during heatwaves, with some inland areas occasionally exceeding 40°C. Heat alerts are usually accompanied by public advice such as staying hydrated, avoiding outdoor activities during the hottest part of the day, and checking on vulnerable people.

United States

Many parts of the United States regularly issue heat advisories or extreme heat warnings during the summer. States, especially in the south and southwest, including Arizona, Nevada, Texas, and parts of California, frequently experience temperatures well above 40°C.

Popular tourist destinations such as Las Vegas, Phoenix, and parts of Florida also issue heat-related alerts during periods of exceptionally hot weather.

Should you cancel your Holiday? 

Receiving a heat alert doesn't mean your holiday is cancelled. Most attractions, hotels, restaurants, and transport services continue operating normally. Most heat alerts are just precautionary and designed to help people stay safe.

Instead, you might need to adapt your plans by starting activities earlier in the day, taking long indoor breaks during the afternoon, and wearing weather-appropriate clothing. These small adjustments can make your trip more comfortable.

However, you may want to review your plans if:

  • Extremely high temperatures are forecast throughout your trip.
  • You are travelling with babies or vulnerable family members.
  • Your accommodation doesn't have reliable air conditioning.
  • Most of your planned activities are outdoors.
  • Wildfires or other weather-related events are affecting your destination.

In these situations, it may be worth adjusting your itinerary or considering different travel dates if your plans are flexible.

How to Stay Safe During a Heat Alert

If a heat alert is issued while you are travelling:

  • Check local weather forecasts each day.
  • Carry water wherever you go and hydrate often.
  • Stay indoors during the hottest hours.
  • Wear light, breathable clothing.
  • Take regular breaks.
  • Choose indoor attractions during the afternoon.
  • Watch children closely for signs of dehydration or heat exhaustion.
  • Follow local advice to continue enjoying your holiday safely.
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