In a sudden shock to residents of Hulimavu area in Bengaluru, their streets and houses were inundated after a breach in the bund of Hulimavu lake on Sunday afternoon.Vehicles were inundated by the flood and water entered several houses in Hulimavu Layout prompting personnel from the National Disaster Response Force to be pressed into service. Efforts were on to shift around 250 families badly affected by the sudden flood which also swept away several cars and two-wheelers, the officials said.