Europe bakes under expansive heat dome as France issues red alerts and Ireland sees 30°C highs

Heat dome parks over Western Europe

One of the most intense heat domes on the planet is parked over Western Europe, driving temperatures 15 to 25 degrees Celsius above average across France, Spain, the UK and Ireland. The high-pressure system, which meteorologists describe as an atmospheric force field, deflects storms and allows persistent sunshine to bake the landscape. On Friday, Paris’s Luxembourg Gardens hit 38.4°C (101.1°F) and Saint-Florent on Corsica reached 41.2°C (106.2°F), setting new June records for France. The heat dome was centered over Germany on Saturday and is forecast to retrograde westward and intensify, parking over the English Channel from Tuesday to Thursday before relenting and shifting east late in the week.

Ireland braces for 30°C

Ireland is set to bask in its warmest spell of the year, with Met Éireann forecasting a steady climb in daily temperatures reaching 24–30°C on Thursday. Meteorologist Rebecca Cantwell said the dry, calm weather was driven by a continental air mass drawn over the country by high pressure. UV and pollen levels are very high, and nights will be uncomfortably mild and muggy. Last month Ireland recorded its hottest May on record, with a high of 30.9°C at Abbeyfeale and Clonmel.

The coming days are going to see a lot of dry, calm and sunny weather on the way. Temperatures look set to rise day on day … with temperatures rising into the high 20s and possibly reaching 30°C in some areas on Thursday.

France issues red alerts and alcohol bans

About a third of France’s departments are under the national weather service’s red heat alert on Sunday, with 40°C expected in some areas and Monday likely to be even hotter. The annual Fête de la Musique celebration, held on the summer solstice, has prompted restrictions: public alcohol consumption is banned in red-alert zones, and organizers were ordered to limit drinking to preserve emergency services. Paris deputy mayor Emmanuel Grégoire warned of the dangers of mixing alcohol, heat and water. Authorities have also reinforced wildfire readiness, tightened surveillance of water supplies to nuclear reactors, and set up misting stations at tourist sites. The heatwave has already forced the cancellation of dozens of trains and the suspension of some school classes; end-of-year exams may be delayed or rearranged. Prime Minister Sébastien Lecornu convened a government heat crisis meeting and ordered ministers to plan for future adaptation, including air conditioning.

the combination of alcohol, heat and proximity to water, those are three risk factors that don’t mix well

UK and Italy brace for 35–40°C

The UK Met Office has hoisted amber extreme-heat warnings for Monday and Tuesday, with temperatures in the low 30s spreading to southern England and peaking around 35°C on Tuesday and Wednesday. That would approach or surpass the June record of 35.6°C set in 1976. In Italy, heat red flags were expanded from seven to eight cities in the north and center, with highs in the upper 30s to low 40s. Tourists in Rome sought shelter at the Colosseum and queued for water, while farmers near Milan used fans and sprinklers to cool livestock. Switzerland’s Schaffhausen already set a June record at 35.7°C on Friday. The World Health Organization’s Europe office noted that over 200,000 Europeans died from heat-related causes in the last four years, with most fatalities preventable, and urged countries to implement cooling centres and flexible working hours.

Progression and peak of the heatwave

The heatwave will intensify through midweek before cooling slightly. Monday will see Central and Western Europe sizzle, with heat expanding into the UK and Ireland. Tuesday and Wednesday are forecast to bring the most widespread extreme temperatures, as the heat dome parks over the English Channel. Thursday could deliver Ireland’s 30°C peak and near-100°F heat in Paris, before conditions turn cooler and more unsettled from Friday.