Ambala/Patiala, Aug. 30 -- After heavy rainfall in its catchment areas in the Shivalik region, the Tangri river started overflowing in Ambala Cantonment on Friday morning, breaking an embankment along the route and inundating adjoining residential colonies. Teams from National Disaster Response Force (NDRF), State Disaster Response Force (SDRF) and police, which were already on high alert, carried out evacuations on boats and shifted residents to safer places. Officials said after heavy rain, the river received over 30,000 cusecs of water and was flowing at almost double of its danger mark of 15,400 cusecs. DC Ajay Singh Tomar visited the area to take stock of the situation. Shelter has been provided to people at dharamshalas and arrangements for food and water have been made," he added. Meanwhile, water levels crossed 50,000 cusecs in Markanda river in Mullana town of Ambala district, surpassing the danger level of 40,000 cusecs. Patiala district also remains on high alert after the water level in the Ghaggar and Tangri rivers rose sharply on Friday evening. The drainage department said the Ghaggar was flowing at 12 feet in the district, just four feet below the critical danger level of 16 feet. Water level in Tangri river stood at 8.7 feet, three feet below the danger mark. DC Dr Preeti Yadav assured that the situation was under control....