AFP: The exceptionally-long La Nina, which has worsened drought and flooding around the globe, is set to continue into February or even March, the United Nations warned Wednesday.The current La Nina weather phenomenon — the cooling of surface temperatures which can cause widespread impacts on global weather conditions — started in September 2020.”The unusually stubborn and protracted La Nina event is likely to last until the end of the northern hemisphere winter/southern hemisphere summer,” the UN’s World Meteorological Organization (WMO) said.”The first ‘triple-dip’ La Nina (three consecutive years) of the 21st century will continue to affect temperature and precipitation patterns and exacerbate drought and flooding in different parts of the world.”The WMO said there was a 75 percent chance that La Nina will persist during December-February, and a 60 percent chance during January-March.