RTCC: It is very likely that an El Nio will take place by the end of the year, the UNs World Meteorological Organisation has said, strengthening scientists predictions that 2014 could be one of the hottest years on record. El Nio, which means little boy in Spanish, is a natural weather event that occurs every two to seven years. It is characterised by unusually warm surface temperatures in the ocean in the central and eastern tropical Pacific. There is a 60% chance that an El Nio will be established...