A disaster management survey carried out by the Raigad administration showed the district has 520 villages that can be affected by calamities like landslides, flooding and water incursion due to high tides, an official said on Saturday, reported news agency PTI.

There are 239 landslide-prone villages, 136 villages that could be affected by floods and 145 villages that could face adverse effects of high tides, he said, reported PTI.