Strong winds and heavy rain batter Slovenia, while France experiences atypical heatwave Severe thunderstorms swept across the Balkans last week, bringing widespread destruction to parts of the region. The storms developed as unstable hot air lingered over the Adriatic Sea while a cold front plunged south-eastward. The front began its journey on 10 June in Slovenia, where the Slovenian Environment Agency recorded 65mph gusts at Ljubljana airport.