Which countries or cities have specific weather disasters?

Urban waterlogging disaster

Due to the large area of ??impermeable underlying surface on the urban surface, the sunken overpasses in urban areas, insufficient enclosure and waterproofing measures for underground facilities, and the design standards of drainage facilities Once heavy rains occur, serious water accumulation will occur in some areas, affecting urban traffic, endangering public facilities (subway lines, underground parking lots, etc. are flooded), and causing urban lifeline system failures (electricity , water, gas, communication lines and network systems, etc.), and even cause casualties to citizens. For example, the "7.10" heavy rainstorm in Beijing in 2004, the "6.23" heavy rainstorm in the west of the city in 2011, the "7.21" heavy rainstorm in 2012, etc.; the "7.18" heavy rainstorm in Jinan in 2007, as well as urban waterlogging disasters caused by heavy rains in Nanjing, Shanghai, Chongqing and other places.

High temperatures and heat are getting worse

With the intensification of global climate warming and the urban heat island effect, disasters caused by high temperatures and heat in cities are becoming increasingly severe. It affects outdoor workers, affects the health of the infirm, the elderly and children, and aggravates drought and shortages of water and power supply (some cities have already imposed power cuts, seriously affecting enterprise production).

Thunder and lightning disasters are increasing

With the increasing number of high-rise buildings, urban electronic equipment, microelectronic equipment and communication systems are becoming more and more sensitive to the impact of lightning. The increase in the intensity of the urban heat island effect has caused an increase in convective weather occurring in cities, and the number of thunderstorm days has also increased, resulting in an upward trend in disaster losses caused by lightning weather.

Strong wind disasters occur from time to time

The number of windy days and average wind speed in urban areas show a decreasing trend. However, due to the large number of high-rise buildings in the city, under certain environmental wind field conditions, the wind between high-rise buildings The emergence of the "narrow tube effect" causes instantaneous strong winds in streets and alleys. Outdoor billboards, trees, facilities and debris are often blown or knocked down by the wind, causing accidental injuries and other accidents.

Increase of fog and haze

With the rapid expansion of urban scale, increase in population, increase in industrial emissions and motor vehicle ownership, the number of days in which haze occurs has increased significantly. The low visibility of fog-haze weather affects transportation, causing aircraft takeoffs and landings to be blocked and highways to be closed. In fog-haze weather, air pollution is serious, and there are many harmful substances in the air, which have adverse effects on human health.