Singapore should brace itself for warmer and wetter days in the next century.

The National Environment Agency (NEA) on Saturday held its own briefing on what a long-anticipated global climate change study by a United Nations panel - which was released on Friday - means for Singapore.

According to NEA's preliminary findings, if the earth heats up by 2100 as expected, very heavy storms in Singapore will "very likely" become even more frequent and intense.

A 3 deg C rise in Singapore's temperature, for instance, means that a very heavy storm, which has a 1 per cent chance of happening in any given year, will be five times as likely to occur.