Residents wash clothes recovered from their flood damaged houses on the banks of the Adyar River in Chennai, India, Sunday, Dec. 6, 2015. Indian authorities were investigating possible negligence after 18 hospital patients died when rainwaters from massive floods in southern Tamil Nadu state knocked out generators and switched off ventilators.The worst flooding in a century in Tamil Nadu has left scores of people dead since November.(AP Photo/Arun Sankar K), APTOPIX