Background
One of the regionals in India was scheduled to be held at Hindustan University at Chennai on December 17 — 18, 2015. Unfortunately Chennai was stuck by a natural disaster. The entire Southern India received heavy rainfall and hence there was a lot of flooding at many places including Chennai around that time. About 347 people died in the state of Tamil Nadu (including Chennai). The damage due to the floods overall in South India is estimated to be atleast USD 3 Billion. It is the costliest flood in 2015.
Ofcourse, due to this the Chennai regionals were postponed. I think everyone here will agree that this was an unexpected, unprecedent situtation and hence it was entirely understandable that the regionals were postponed.