This paper describes that what are hazards and disasters, analyses their trends and evaluates the impact of climate change on them. Observations recorded since 1950 shows that increase in some thrilling weather events. The latest Special Report on Extreme Events and Disasters (SREX) by the Intergovernmental Panel on Climate Change (IPCC) forecasts that there will be more increase in the frequency of heat waves, intensity of droughts and speed of hurricanes till 21^st century. Heavy rainfall events will also rise having a great impact on the frequency of floods and also have impacts on the landslides. This paper scrutinizes the knowledge of event attribution, its probability and issues. It also examines the worldwide distribution and effect of natural disasters.