At least five people have been killed and 29 injured as a freight train derailed and exploded in north-east Bulgaria, destroying about 50 houses and public buildings.
At least 21 people are feared dead in a 6.2 magnitude earthquake which struck central Italy in the early hours of Wednesday morning, while others are still trapped under collapsed buildings.
The summer is in full swing in France but beneath the surface there is growing anxiety.
With every new terror attack, French citizens stoically declare that "life goes on", but despite this show of defiance, a creeping anxiety has taken hold of society.
A man has been arrested on suspicion of murder after a woman was killed and five injured in a knife attack in Russell Square, central London.