Macron calls for vigilance as western Europe faces second heatwave of year

More than half of France's population under severe weather warning with temperatures expected to exceed 40C

More than half of France's population is under a severe weather warning as large swathes of western Europe endure the second extreme heat event of the year with temperatures expected to exceed 40C (104F).

The French president, Emmanuel Macron, called for extreme vigilance from everyone", asking citizens to take care of our oldest and most vulnerable people" and follow government advice. We are going through difficult days," he said.