New Delhi, Sept. 10 -- A weak La Nina is likely to emerge between September and November for the second consecutive year, and exacerbate drought in some parts of the world, and heavy rainfall and flooding in others, the World Meteorological Organisation said on Thursday.

Despite the cooling influence of La Nina, temperature over land particularly the northern hemisphere except India is likely to be above average during the next three months, WMO added. South Peninsular India is likely to record below normal temperatures while northwest and central India are likely to record normal temperatures according to WMO's projections.

La Niña refers to the large-scale cooling of the ocean surface temperatures in the central and eastern equat...