Cities Where Rising Seas Could Leave Millions Homeless

Cities Where Rising Seas Could Leave Millions Homeless
Cities Where Rising Seas Could Leave Millions Homeless

Within 100 miles of one seashore or another, 44 percent of the world’s population and about 40% of America’s live. More than 570 coastal municipalities worldwide face a predicted sea-level increase of more than a foot-and-a-half by 2050, according to C40, a network of international megacities that is worried about climate change.

Due to this, at least 800 million people are at risk, either permanently or temporarily. In addition, several World Heritage sites and other cultural treasures could be jeopardized with houses and businesses.

Many factors are likely to contribute to catastrophic flooding, including melting polar ice caps and other land-based ice (such as glaciers); warming seas (water expands as it warms); and irregularities in the moon’s orbit, known as “moon wobble,” which is expected to cause higher-than-normal tides in the coming decades.

The majority of the cities on this list are preparing for coming flooding by creating sea walls and barriers, among other techniques, to preserve their coastlines. However, it remains to be seen whether these steps will be sufficient and implemented promptly.


Cities Where Rising Seas Could Leave Millions Homeless


10. Guangzhou, China

Once known as Canton, this ancient port and transportation center in the Pearl River Delta is one of the most populated cities in China. The Ocean Health Index classifies about a fifth of its urban area as being at high or extreme risk for the effects of sea-level rise.

There are almost 2,000 miles of seawalls and other flood barriers protecting Guangzhou and other delta metropolises, but many of them would be overwhelmed if water levels rise by afoot. Population 2021: 13.64 million.


9. Tianjin, China

This sizeable commercial hub in the low-lying basin of the Hai River, a tributary of the Yangtze, is home to 285 Fortune 500 companies. Although, according to Earth.Org, “it already suffers from floods during heavy downpours, and increasing water levels would impede its straining drainage systems,” as much as 82 percent of the population might be relocated by 2100 in the worst-case scenario. Population 2021: 13.79 million.


8. Manila, Philippines

Residents in the Philippines’ capital are no strangers to flooding resulting from seawater and heavy rainfall. The country is hit by more than 20 typhoons each year, many of which are not well-drained.

Parts of Manila have been submerged below sea level due to the depletion of aquifers beneath the city, and the level of Manila Bay is increasing four times faster than the global average. As a result, as early as 2030, most of the city’s people could be severely impacted by flooding—population 2021: 14.16 million.


7. Lagos, Nigeria

Lagos, Nigeria’s commercial center and the continent’s most populated country in jeopardy because of increasing sea levels and river run-off. Its drainage systems are in disrepair and frequently clogged with trash.

“The run-off in Lagos is not effectively handled,” according to an environmental specialist who spoke to The Guardian. According to Earth.Org, by 2100, 32 percent of the city’s population may have been displaced. Population 2021: 14.86 million.


6. Kolkata (Calcutta), India

Two years ago, the Times of India reported that Kolkata could be “the worst-hit among Indian coastal towns as sea levels rise due to global warming.” The Times went on to say that by 2050, nearly the entire city and its suburbs would be at risk of annual floods, which would “impact many more million people than previously thought.” As a result, almost the whole population may be compelled to flee their homes—population 2021: 14.97 million.


5. Buenos Aires, Argentina

If current trends continue, the majority, if not all, of the half-million people who live around the mouth of the Rio de la Plata will have to relocate by 2100. This is because storm surges are dangerous for the river, especially when strong winds and high tides coincide. Furthermore, the city’s summer temperatures are rising faster than the global average, heightening the risk of thermal expansion of neighbouring waters, potentially pushing levels much higher than they would be otherwise. Population 2021: 15.26 million.


4. Istanbul, Turkey

According to a report by the Turkish parliament’s Global Climate Change Research Commission, the waters of the Bosphorus Strait, which separates the European and Asian parts of this famous metropolis, might rise by 10 to 16 feet by the end of the year the twenty-first century. Saltwater incursion could salinate Terkos Lake, the city’s primary source of drinking water, rendering structures, including centuries-old historical sites near the strait, unusable. Population 2021: 15.42 million.


3. Mumbai (Bombay), India

According to one study, Mumbai is most at risk from sea-level rise and extreme weather events (after Guangzhou in China). Uncontrolled growth with inadequate drainage systems, which would be entirely overwhelmed by a combination of rising sea levels and weighty rain. At least three million people could be relocated, according to Earth.Org. Population 2021: 20.67 million.


2. Dhaka, Bangladesh

According to scientists, Bangladesh’s low-lying, highly populated capital would lose around 17 percent of its land area to persistent flooding by 2050, displacing millions of people. Its location on the Ganges Delta, the world’s largest river delta, makes it vulnerable. Population 2021: 21.74 million.


1. Shanghai, China

Shanghai, one of the world’s most populated cities, “sits on the Yangtze River estuary on low-lying, soft, sandy soilâ[which] indicates disaster,” according to Earth.Org. It is surrounded on three sides by the estuary, the East China Sea, and Hangzhou Bay, in addition to the estuary.

Despite numerous seawalls, the sinking of the land is claimed to threaten at least half of the city’s population. According to one study, more than 20 million people in the Shanghai region will live on the ground permanently submerged by 2100. Population 2021: 27.8 million.