The document discusses the role of radio in disaster situations. It notes that between 1975-2015, natural disasters killed over 2.5 million people and caused $1.7 trillion in damages worldwide. It discusses how in 2008, the International Union of Radio Science created a working group to study how radio science can support risk management and relief efforts related to natural and human-induced disasters. The group aims to help with prediction, reducing local risks, immediate response, relief support, and learning from disasters - all areas where radio science can play a role. Specific disaster examples from India where radio helped with communication include the 1993 Killari earthquake, 2013 Kedarnath floods, and 1984 Bhopal gas tragedy.