Engineers at a Derbyshire reservoir said they remain “concerned” a dam could burst and flood a nearby town with 1.3 million tonnes of water.
Sudden floods have caused evacuations and disruption across the UK after heavy downpours.
The men were detained at various locations in Sheffield and one man in Chesterfield
Four arrested in raids in Derbyshire and South Yorkshire
A Pokémon Go player was saved by mountain rescue teams after she slipped over in the Linacre Woods, Derbyshire, injuring her back, neck, ankle and elbow
If it's peace and quiet you're after, these remote corners of the country could be just what you're looking for