It have displaced or killed millions. A long term stability of climate is threatened further by the global warming. Diversity of climate in country makes analysis of above complex issues. Tropical rainy season covers the regions experiencing some warm persistent or high temperatures that normally fall below 18 Degree C. country hosts multi climatic types falling under the group. Most humid is tropical wet monsoon that covers strip of the southwestern lowlands abutting Western Ghats, Malabar Coast and southern Assam .

Dry climate and tropical wet season of country is more common, it is drier significantly than the wet zones and prevails over the most part of inland peninsular except for semi-arid rain shadow. Early summer and winter are dry, long with the temperature averaging over 18 Degree C.

it is exceptionally hot summer there, temperature is lying low that may exceed at 50 Degree C during the month of May, heat waves can kill the hundreds of people in country. A rainy season last from the month of June and September, where annual rainfall averages between 750 to 1500 mm across the region.