At least 20 people are now known to have died in Europe’s worst storm in years, which left much of southwestern France and northern Spain devastated. In places the winds reached 190 kmh. Eight people died in France, including an elderly couple overcome by carbon monoxide fumes from a back-up generator they were using after their power was cut off. Nearly 700,000 homes and businesses remain without power, with electricity cables brought down by falling trees.Despite the winds dying down, authorities say the danger is not over yet. Heavy rains over the weekend mean many rivers are full, leading to fears of flooding. Spain has declared four days of mourning for its dead, including four children killed when a sports centre collapsed outside Barcelona. Two people were found dead in the northwestern province of Galicia. They are believed to have died from carbon monoxide poisoning from a faulty generator. Three people are known to have died in Italy, two in a landslide provoked by the winds and rain on the southern A3 motorway in Calabria. And a woman died when waves swept swept out to sea from a beach on the Amalfi coast south of Naples.