The boy climbed into the unlocked car while out of his parents' sight; his mother was hospitalised in shock. Two other children died in Carpentras on Monday.

Two children found dead in a car as large swathe of western Europe suffers a ferocious heatwave forecast

The siblings, aged 2 and 4, had accidentally locked themselves inside the car, officials said. The 33-year-old mother was treated for shock.

Two children were found dead in a car in France on Monday, believed casualties of a heatwave piling record temperatures and health warnings across much of Europe. The youngsters,…