It is being caused by a warms of the surface waters in Pacific Ocean, to continue for next 2 weeks
The central Pacific is predicted to continue to warm, with neutral conditions likely for the southern hemisphere autumn
India's monsoon season starts from June and extends up till September
An evolving El Nino is also equally harmful for Indian monsoon as experience from 2014 shows
La Niña, which causes bountiful rain, is ruled out for now
The 2015-16 El Niño was the strongest since the record event of 1997-98
El Niño has had an over-bearing impact on rainfall in India
Atmospheric carbon dioxide concentration is rising due to human emissions, but this year it is getting an extra boost due to the recent El Nino event
Climate indicators associated with El Niño, which emerged in 2015, have now returned to neutral levels, the BOM said
After a hotter than usual summer, a better monsoon would boost agriculture, rural demand
These included a devastating cholera outbreak in Peru in 1990, leading to over 13,000 deaths.