Osaka risks being wiped out by rising oceans



by LORENZO CIOTTI

Osaka risks being wiped out by rising oceans

The city of Osaka, Japan, precisely in Kansai, is located at an average altitude above sea level of only 23 meters. If the global temperature rises by 3 degrees Celsius, as some scientists predict, vast areas of the metropolis will be buried under water.

The territory of Osaka is mainly flat with the exception of Uemachi-daichi, a low plateau 12 km long and 2.5 wide which in ancient times was the only part of today's city that emerged from the sea. The highest point of the municipality is located at 27.5 m a.s.l., in the eastern district of Tsurumi-ku, while the lowest is 2.2 m below sea level in the north-western district of Nishiyodogawa-ku.

The west side of the city overlooks Osaka Bay, the eastern end of the Seto Inland Sea. On the other sides, the city is surrounded by ten smaller municipalities belonging to Osaka Prefecture, and the city of Amagasaki, which is part of Hyogo Prefecture, in the northwest.

The area that delimits the municipal boundaries is the largest among those of the other municipalities and districts of the prefecture.

Osaka risks being wiped out by rising oceans

Climate Central report said that the global population at serious risk of permanently ending up underwater is three times higher than previously existing estimates.

150 million people by 2050, a number that rises to 190 million by the end of the century. The rise in sea levels is one of the many consequences of the climate crisis, and it is a phenomenon already underway. The average height of the sea has in fact swelled by about 23 cm since 1880 and the number increases by 3.2 mm every year.

It is enough to do a bit of math to understand that by 2100 the level of the oceans will rise by almost one meter, so much so that hundreds of coastal cities around the world could find themselves in extreme difficulty. The most vulnerable geographic regions are atolls such as the Bahamas, Marshall Islands, Cayman Islands, Tuvalu, Kiribati, ie the Maldives.

Among the cities most at risk, in addition to the capital of Indonesia, Jakarta, there are Shanghai (76%), Hanoi (60), Calcutta (51), Hong Kong (46), Osaka and Tokyo (38 and 30), Rio de Janeiro (24), New York (23) and Buenos Aires (19).