Obviously, there are many uncertainties associated with climate modelling. But as weather extremes pose real risks to human life and economic well-being, the predictions should not be taken lightly. Cuts in greenhouse gas emissions to prevent such risks are needed urgently. Data and analyses on weather extremes are poor and not comprehensive, hence it is difficult to make definite assessments about the frequency of extreme weather events, or climate variability on a global scale. Many regions have experienced heat waves with extra deaths, increases in pests and diseases and agricultural losses.
Weather extremes have high economic and human costs.
The insurance industry is certainly worried about the soaring costs of severe weather damage and is already refusing cover for various weather events in certain regions. In Europe, above-normal temperatures prevailed from July to December. Vienna recorded its highest annual temperature in over 200 years, while Hamburg recorded its warmest July since 1850 and central England had its warmest November in 336 years. Australia, on the other hand, suffered from the worst drought since the first world war. This frequency is unprecedented in the last 50 years.