Dengys adroddiad yr IPCC bod tymheredd y byd yn debygol o godi o leiaf 2°C yn uwch na’r lefelau cyn-ddiwydiannol, ac o bosibl cymaint â 5°C yn uwch, erbyn diwedd y ganrif hon. Mae’r adroddiad yn amlygu’r risg cynyddol a wynebwn oherwydd tywydd eithafol, sy’n peri costau economaidd a chymdeithasol. Rydym eisoes yn dioddef rhai o effeithiau tywydd eithafol yng Nghymru ac mae disgwyl i hynny waethygu, felly mae angen inni baratoi.
The IPCC report shows that global temperatures are likely to be at least 2°C above pre-industrial levels, and possibly as much as 5°C higher, by the end of this century. The report highlights the increasing risk from extremes of weather which has both an economic and social cost.  We are already vulnerable to extreme weather events in Wales and we need to prepare for the expected future increase in such events.