Red heat alerts have been issued in France, Spain and other nations across western and central Europe as heatwave conditions are forecast to intensify in the coming days with highs of more than 40°C.
More than half of France’s regions are currently under the harshest weather warning, with hundreds of schools ordered to close and highs of 42°C hitting Bordeaux on Monday, forecaster Météo-France said.
Two children aged two and four have been found dead in their family car in the town of Carpentras in southern France, in an accident being linked to the weather.
Similar red warnings have been issued by the authorities in Germany, Italy, Switzerland and Luxembourg.
Temperatures are expected to peak in many areas on Wednesday, with 41°C forecast for Paris.
In the capital on Monday, several train lines also reduced services. France’s national railway operator SNCF urged “vulnerable” people to avoid or postpone train travel this week.
Some 845 schools in France were shut, while a further 1,800 are allowing pupils to finish classes early, the education ministry said. But more than a million high school students were taking their oral final exams for the baccalaureate amid the heat.
A red heat alert is the highest of four warnings issued by Météo-France and advises people to exercise extreme caution in potentially life-threatening conditions.
Dozens of other regions in France are under an orange alert – the second-highest warning – with an estimated 63 million people across the country affected.
The forecaster warned that the heatwave will be “widespread, long-lasting and intense” – with temperatures not expected to drop until the end of the week.
The rising temperatures are being driven by hot air moving north from the Sahara desert, which is in turn trapping hot air over the affected areas, with forecasters suggesting the conditions could result in one of the longest heatwaves in recent years.
Scientists have said that recurring heatwaves are a marker of global warming, with Météo-France noting that of the 51 heatwaves recorded in France since 1947, 34 have taken place since 2000 and 26 since 2011.
Elsewhere, the conditions have seen: