Prelims level : Environment Mains level : Technology, Economic Development, Bio diversity, Environment, Security and Disaster Management
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Why in News:

  • More than a thousand families in Tripura have been displaced after their houses were submerged in flash floods that hit parts of the state.


  • The floods were triggered by heavy rains, which caused the water level of river Juri and river Kakti to rise submerging houses in low-lying areas of North Tripura, Unakoti and Dhalai districts. The National Disaster Response Force (NDRF), Tripura State Rifles (TSR), firefighter team, district, and state administration have launched a joint rescue operation and have brought over a thousand people to safety. According to Skymet Weather, the rains have been attributed to the cyclonic circulation present over Northeast Bihar and a trough extending from this system to Nagaland. Another cyclonic circulation is seen over South Assam and a trough is also running from eastern parts of Bihar to North Odisha.
  • Warm and moist winds are continuing over the northeastern states. Apart from these weather systems, Western Disturbance was also moving across higher latitudes.

Flash flood

  • A flash flood is a rapid flooding of low-lying areas: washes, rivers, dry lakes and basins. It may be caused by heavy rain associated with a severe thunderstorm, hurricane, tropical storm, or meltwater from ice or snow flowing over ice sheets or snowfields.

National Disaster Response Force (NDRF)

  • It comes under Ministry of Home Affairs
  • It is the only dedicated disaster response force in the world
  • Established in 2006
  • HQ: New Delhi
  • It works under National Disaster Management Authority (NDMA) which lays down policies, plans and guidelines for disaster management.
  • At present there are 12 battalions in NDRF which are deployed strategically across country to provide immediate response.
  • 4 new battalions are sanctioned by Union Cabinet
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