Rising sea levels
Studies have shown that climate change is going to have an impact on urban areas along coastlines because of a potential rise in sea levels (Walsh, et al. 2010, p.76). This might result in flooding as well as the potential loss of lives in case sudden floods take place. Because a large number of cities are established along coastlines, it is possible that these areas will become affected and this has made it imperative for there to be contingency measures to deal with this potential problem. Rising sea levels would mean that a large number of settlements would have to be abandoned because the water levels would not allow for permanent settlements. Furthermore, rising sea levels might lead to a serious housing crisis in many urban areas because much needed land would end up under water. The growing urban population makes this problem potentially worse because many of these individuals tend to live in buildings that are not well constructed and can only be termed as slams. Therefore, in case of sea levels rising, it is possible that evacuation might become extremely difficult since the flooding might come about suddenly, creating a situation where rescue efforts are not effective (Tigay, 2011, p.733). This is the case in India where large parts of its population, estimated to be about 70%, live in urban areas. The rise of sea levels even by a few metres might cause problems for a large percentage of this population because many of their settlements would be under water. Under these circumstances, populations in urban areas are likely to suffer from flooding of land which might have a negative impact in the whole of their lives. There is a possibility that a rise in sea levels might bring about the salinisation of water resources; a resource that is often scarce in urban areas. Furthermore, rising sea levels might bring about the destruction of ecosystems and natural habitats that are essential in the supply of much needed products to urban areas; essentially making these places inhabitable.
Access to water
Climate change is likely to bring about changes in patterns of precipitation as well as the water cycle in such a way that it results in a threat in the water supply of large urban centres (“Climate change and the urban environment,” 2010, p.9). This is especially the case in large cities because it would be extremely difficult to supply water efficiently to its entire population. The ongoing rural to urban migration as well as the growth of the population in urban centres could make the problem worse because a large population means a need for greater access to water. With climate change, urban governments will have a hard task in ensuring that the entire population has access to clean water. There is also a possibility that the quality of water supplied within urban areas would be greatly reduced because it might not undergo the necessary checks and treatment before being distributed because of high demand for it. The risk of a drying up of water resources means that those urban areas in dry regions will be hit hard since many of them rely heavily on water supplies from wetter areas as well as from reservoirs (Katel, 2011, p.1025). However, with an increase in global warming due to climate change, the reliability of reservoirs will be put to question, especially in circumstances where there is not enough rainfall. The large urban population might end up being left with very little water and as a result face shortages that bring about a lowering of living standards in cities. Climate change is therefore increasingly putting water resources in urban centres at risk of either reducing significantly or even drying up, and this to the detriment of its population.
Health risks
Cities in developing countries, especially those in tropical areas, have a high potential of having increasing cases of diseases related to the environment as a result of climate change. Global warming helps produce an environment in these cities where it is easier for such parasites as mosquitoes to breed and this might bring about an increase in incidents of malaria and yellow fever. The water puddles in which mosquitoes breed tend to come about in areas where there is excessive rainfall of in rivers where there are droughts and this means that changes in climate might bring about these conditions. In relation to the point made above, water shortages brought about by climate change might have an impact on the spread of diseases within urban areas due to lack of sanitation. In this way, such diseases as cholera and typhoid become more prevalent since access to water resources in these areas might end up being limited. In recent years, there has also been a rise in respiratory diseases in urban areas as a result of higher temperatures in warmer cities which has the effect of increasing the impact of pollution. A majority of the people who live in urban areas are poor and these are barely able to make a living. In circumstances where there is climate change, they are the poor are the ones who suffer the most because they do not have the possibilities to adapt to these changes that their wealthier counterparts do (Price, 2014, p.673). The inadequate sanitation that is a feature of poor neighbourhoods due to their crowded conditions as well as poor supply of water means that any changes in climate might bring about a health crisis in these areas. Under such conditions, there is always a risk that areas within cities that were previously not affected by contagious diseases end up becoming victims.
Heat waves
Changing climate has brought about the development of global warming that has increased the risk of heat waves in urban areas. This is because in general, urban areas are warmer than surrounding regions as a result of a higher usage of energy as well as the modification that has taken place on the land surface (Gillis, 2013). It should be noted that in recent years, there have been more incidents of deaths from heat waves in urban areas than in previous periods. Heat waves as a result of climate change have therefore become a real issue in today’s urban societies because individuals tend to be caught unawares and might end up being struck down unexpectedly (Meehl and Tebaldi, 2004, p.994). In most parts of the world, heat waves are a new phenomenon and its coming about more frequently and with an increased intensity can be attributed to climate changes which have come about as a result of human activity especially in urban areas. Waste heat that is produced in urban areas as a result of massive energy use by its population has increased chances of death occurring as a result of heat waves. Predictions of heat waves have shown that in coming years, as they become more intense and frequent, it is likely that hundreds of people in urban areas across the world might end up losing their lives in these incidents. Therefore, while studies concerning this increasingly frequent phenomenon are being conducted in order to find solutions, the risks to urban populations remain constant because climate change patterns have become extremely unpredictable.
Damage to infrastructure
Recent years have seen massive losses of infrastructure in urban areas into billions of dollars and these have been caused by natural forces such as cyclones that are as a direct result of climate change. Changes in the climate have made weather patterns very unpredictable because even with modern technology, it is often difficult to predict how forces of nature are going to impact on different areas. Urban areas have borne the brunt of damaged infrastructure because such damage, such as flooding as well as destruction of electricity lines have made it almost impossible for people in these places to return to life as normal in the immediate aftermath of these events (Lehmann, 2014). Urban areas tend to have a large assortment of architectural designs that range from traditional to modern and this has allowed for diversity in these environments. However, climate change has changed that status of traditional houses in such a manner that in case of natural disasters, they have come to be considered unsafe. This is because they are some of the most vulnerable structures in the urban areas, with many of them being carried away or utterly destroyed in such occurrences as cyclones or floods. The result has been that a large number of individuals who live in urban areas have come to be at risk from natural occurrences that might take place at any time and over which they have no control. Because of their large concentration of human populations, urban areas have become places where individuals are at a high risk of becoming victims of natural disasters.
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