Yes, the Executive Engineer in charge of the Dam/Head Works will issue necessary warnings through Press/Media etc, well in advance about the opening of Dam shutters/Canal systems, warning the Public to take care, and not to allow people/cattle graze in river beds etc.
The Executive Engineer of Water Resource (Major Irrigation) Division is the officer to take immediate action in the case of a breach of a river or Costal erosion in beaches under his jurisdiction.