There have also been severe monsoon floods across South Asia, abnormally heavy rains in northern Europe, China, Sudan, Mozambique and Uruguay, extreme heatwaves in southeastern Europe and Russia, and unusual snowfall in South Africa and South America this year, the WMO said.
"The start of the year 2007 was a very active period in terms of extreme weather events," Omar Baddour of the agency's World Climate Programme told journalists in Geneva.
While most scientists believe extreme weather events will be more frequent as heat-trapping carbon dioxide emissions cause global temperatures to rise, Baddour said it was impossible to say with certainty what the second half of 2007 will bring.
