Even as the generous rainfall in Mumbai in grabbing headlines, there is a nine per cent monsoon deficit in the country so far. Rainfall deficit of below 10 per cent is dubbed as drought. Dr DS Pai, scientist and lead forecaster for India Meteorological Department told NDTV that the possibility of a weak El Nino developing could be a cause of worry. Usually, a warmer El Nino, also called Little boy or Christ Child in Spanish, heats up the Pacific Ocean and sometimes leads to deficient monsoon.