IOM says only 14.4% of $16.62M needed for flood preparedness secured as heavy rains threaten vulnerable communities.
World Meteorological Organization says extreme weather need not become humanitarian emergency; UN aid chief warns El Nino is 'behemoth', 'wrecking ball.
UNEP report warns current climate policies could drive global warming to 2.8C this century, calling for urgent, sustained emissions cuts.
At current rates, warming could reach 2C above pre-industrial levels before 2050, warn scientists.
Authorities ease confinement orders as emergency crews continue rescues.