Udayavani: Establishing a link between climate change and mental health, the World Health Organisation has said extreme weather conditions like floods, droughts and natural calamities can lead to psychiatric illnesses. "Psychosocial illnesses are a part of the various health issues associated with climate change," Poonam Khetrapal Singh, Deputy Regional Director, WHO, said. Anticipating that severe flooding may become more frequent due to global warming, a WHO report said that …