Torrential rains, the highest in a decade, lashing the Steel City and its surrounding areas in Jharkhand, disrupted life for the third day on Wednesday.
Met office sources said a record 338.1 mm rainfall was recorded here since Tuesday morning.
Railway services came to a grinding halt due to the rains, Railway sources said. Most of the trains passing through Tatanagar were either cancelled or diverted.
The police and fire-brigade personnel were kept on high alert and executive magistrates asked to watch the situation which might worsen if the rains continued, East Singhbhum deputy commissioner Ravindra Agarwal told PTI.
Waterlogging was reported from low lying areas and boats were used to evacuate people, he said.
"We have shifted about 400 people to safer places but some people in Kadma and Mango are still stranded on roof-tops," Agarwal said.
There was, however, no report of any casualty, he said.
Over 100 families in Jugsalai, Bagbera, Shastrinagar, Azadnagar, Daiguttu were affected as water gushed into the areas from Kharkhai river.
Road traffic in several areas, including Bistupur, Jugsalai were disrupted due to water-logging.
The boundary wall of an automobile factory at Adityapur industrial area collapsed last night washing away several semi-finished equipment, including gas cylinders and huge quantity of hydraulic oil.
While some schools in the steel city were closed due to waterlogging, attendance in offices was thin.