At-risk communities in Asia are warning that they have "no hope" of coping with more climate catastrophes and some even fear "extinction" if the world does not act quicker, after the U.N. said global warming was close to being out of control.

Climate experts are also concerned the effects could worsen inequalities in a region where many people rely on natural resources for their livelihoods, pushing more into poverty.

The U.N. climate science panel on Monday warned in a major report that the average global temperature will likely cross the 1.5-degree Celsius warming threshold within the next 20 years — bringing stronger droughts, heat waves, floods and storms.