UN weather experts in El Nino alert
There is a strong chance an El Nino weather event will reappear before the end of the year, a UN agency has warned.
The El Nino, a flow of unusually warm surface waters from the Pacific Ocean towards and along the western coast of South America, shakes up climate patterns worldwide and usually raises global temperatures.
An update from the World Meteorological Organisation (WMO) in Geneva puts the odds of El Nino at 60% between June and August, rising to 75-80% between October and December.
WMO secretary-general Michel Jarraud said El Nino leads to "extreme events and has a pronounced warming effect" on top of man-made global warming.
The outlook is for peak strength during the last quarter of the year and into the few months of 2015 before dissipating.