El Nino worst in over 15 years, severe impact likely: UN

The "El Nino" phenomenon, which sparks global climate extremes, is this year the worst in more than 15 years, the UN weather agency said Monday, warning it was already causing severe droughts and flooding. The World Meteorological Organization said El Nino, which occurs every two to seven years, had resurfaced a few months ago, become "mature and strong", and was expected to become even more powerful by the end of the year.