Sea water intrusion damaged houses along the shore, at Srinivasapuram locality in Chennai city. Seawater incursion during summer has been slowly eating up a part of the shore along the hamlet for the last few years. On Wednesday too, portions of two houses were damaged. A few families living in a row of houses behind the damaged ones vacated. Fishermen say an area of about a kilometre has almost been lost to erosion. The walls and roof of the houses collapsed as the sand got eroded from underneath.