Last week, the world was abuzz with the latest climate change assessment report by the Intergovernmental Panel on Climate Change (IPCC), and for good reason: for the first time ever, the IPCC is unequivocally holding humans to blame for the 1.5°C increase in global temperature, which would inevitably occur by 2040. The near 4,000 paged-report makes abundantly clear the damage human-driven activities have caused to the environment, as well as the impacts consequent of those actions. It also makes it clear that no place on earth is spared from the effects of a rising global temperature.
Chapter 3 of the IPCC report details the emergence and intensity of climate change related events by region under different situations of global warming. For Southeast Asia, three key events were identified: (1) flooding due to sea level rise; (2) precipitation events; (3) and crop yield.
Sea level rise and coastal flooding
Global average sea level is estimated to rise between 0.26–0.77 metres by the end of the 21st century if global warming is limited to 1.5°C; in comparison, a 2°C increase in global temperature would mean an addition of about 0.1 metres. In either case, the Southeast Asian region is projected to be one of the most at risk of coastal flooding, assuming that there are no improvements made to existing protection levels. Interestingly, one of the studies (Clark et al., 2016) referenced in the report identified Indonesia and Thailand as countries with a population count of above 50 million facing a particularly high risk of coastal flooding.
That being said, this news of sea level rise is nothing new—similar projections have been made time and again, supplemented by interactives maps by organisations such as NASA and Climate Central. All of them arrive at the same conclusion: coastal flooding is fast becoming an increasingly huge problem, and how much damage can be contained is heavily dependant on how much global warming can be limited. A Greenpeace report recently estimated that by 2030, rising sea levels would leave 15 million people across seven major East and Southeast Asian cities vulnerable to flooding, along with a projected cumulative economic damage of about USD724 billion.