
A roof destroyed by a storm hangs from an apartment building in Bydgoszcz, Poland. Aug 12, 2017.
The two girls, aged 13 and 14, were crushed by falling trees while sleeping in a tent when a storm hit the campground for Girl Guides and Boy Scouts in the northern village of Suszek.
Another 20 children were said to have been injured.
A woman died when a tree hit her house in the northern village of Konarzyny.
In a nearby village, a man sleeping in a tent also perished after being hit by a tree brought down by high winds.
Authorities in the same region also confirmed the death of a fifth victim, a 48-year-old man, crushed by a tree.
A total of 28 people were reported injured.
Power was cut to around half a million homes and businesses as violent winds downed trees and ripped off roofs in northern and southern regions.














Comment: Severe storms hit Europe
Update (14.08.2017): According to tvnmeteo the deadly storm system which caused devastation in parts of Poland was a phenomenon called a bow echo. Severe straight-line winds can be produced by these systems, which can be seen on radar imagery shaped like an archer's bow. Wind speeds were recorded of 112 km / h in Chojnice, 125 km / h in Gniezno and 151 km / h in Elblag.
Bow echo storm system over Poland.