El Nino has brought hot weather to much of Bolivia, at least five major cities report their highest temperatures in more than half a century.
Hot days in development countries are likely to increase.
Current climate event is still strong but it is too early to say whether it will be most powerful on record, says World Meteorological Organisation
Besides global warming increasing hurricane intensity, its impact on coral reefs is making this natural wave barrier more fragile.
It is likely 2016 will be the hottest year ever recorded, April was 1.11C warmer than in 2015.