The universe maintained well  that our all living places maybe attain temple status. if we not maintaining that creating disturb the result will yield natural clamities. Examples the recently took place heavy rainfall at chennai is the classic example.
The poor urban planning and bringing IT corridor in asias biggest wet land leads to the rain water stagnant in many places in the south chennai during Nov and Decm 2015 monsoon period. The city experienced 3 successive floods in Nov14, 23rd and final flood which took place on 2nd dec 2015 took many hundreds people who have lived along the Adayar river banks and adjacent area people were died and thousands of people home less and lacks people were worst affected by this flood.The average rainfall of 17cm , 24Cm& 48cm on these respective  days not able to drain out through cannals .on 2nd dec the 29000 cubic ft water opening from chembarambakkam lake and rain water about 65000 cu ft were cushed through adyar river flooded the entire saidapet , mudichur,  pallavaram, west tambaram,  paallikaranai and kottur puram were worst affected.
The rain harvesting places and its drain cannals were occupied by the people leads to this great disaster happened.This would have been avoided if water management system effectively implemented by the Tamilnadu government.Atleast this is the stage the other indian cities take precautions and took corrective measures in urban development in future to avoid such a casualties.