protest: MDMK general secretary Vaiko leading a demonstration in the city.

MADURAI: Any lethargy by the State Government on the Mullaperiyar dam row with neighbouring Kerala would certainly ruin the economy in southern districts of Tamil Nadu and also lead to water crisis in Madurai in the near future, said Marumalarchi Dravida Munnetra Kazhagam (MDMK) general secretary Vaiko here on Tuesday.