Lead: A wave of intense tropical cyclones has swept through East Asia over the past few months, striking regions where such weather is a familiar part of life — but at an alarming scale.
In August, fishermen in Jiangsu province, China, returned to their boats beneath a crimson sky after Super Typhoon Dolphin made landfall along eastern coastlines. The typhoon, which churned across the Pacific for nearly two weeks before impacting mainland China, triggered severe flooding and dozens of casualties. This event was not isolated; it followed a pattern of increasingly powerful storms that have defined this year’s climate season in the region.
El Niño: A Climate Phenomenon Amplifying Storms
El Niño is a naturally occurring climatic cycle characterized by unusually warm sea surface temperatures in the central and east-central equatorial Pacific Ocean. These temperature anomalies alter atmospheric circulation patterns globally, leading to intensified rainfall, droughts, and more frequent extreme weather events — including typhoons.
The phenomenon typically occurs every two to seven years and lasts for about one year. This year's El Niño has been identified as particularly strong by multiple meteorological agencies. According to the UK Met Office, it represents "the strongest in living memory" and is projected to persist until at least February or March 2024.
Key data from monitoring stations operated by the Japan Meteorological Agency (JMA) show that sea surface temperatures in the equatorial Pacific reached a record high of 4°C above normal during September 2023 — surpassing the previous peak recorded in December 1997 when temperatures were 3.6°C higher than average. These elevated oceanic conditions provide abundant thermal energy for storm development and intensification.
The Path of Typhoons: Deviations, Intensities, and Impacts
This year’s typhoon season has seen storms not only grow stronger but also shift their typical trajectories. In June, Japan faced two major tropical cyclones simultaneously — Typhoon Mekkhala and Severe Tropical Storm Higos — both moving toward its eastern coast. The dual threats prompted emergency evacuations affecting over one million residents across the country.
July saw Tropical Storm Narra graze China's southern coastline near Guangxi province, submerging several villages and displacing tens of thousands of people. A riverside park in Nanning, a key city in southeastern China, was completely submerged under storm-driven floodwaters, illustrating how even urban green spaces can become vulnerable during extreme events.
In August, Super Typhoon Dolphin traversed the Pacific Ocean for 16 consecutive days before making landfall on eastern China’s coastal regions. Its passage brought heavy rainfall and flash flooding that damaged infrastructure and resulted in multiple fatalities. Later that month, Typhoon Saudel made landfall over three southeast Chinese cities within just one week — disrupting transportation networks and forcing mass evacuations across several provinces.
Storm Intensity and Climate Metrics: The ACE Index
The Accumulated Cyclone Energy (ACE) metric is a standard tool used to quantify storm activity during a season by measuring total intensity of tropical cyclones over time. It combines wind speed data with duration to produce an energy score for each typhoon event.
Data from the Asia-Pacific region indicates this year’s ACE reading in Southeast and East Asia has been forecasted at nearly double the 30-year average baseline. This significant increase suggests that storms are not only more frequent but also stronger, longer-lasting, and potentially more destructive than historical norms.
Scientists attribute these trends primarily to prolonged exposure of warm ocean waters — which fuel typhoons through increased evaporation rates and moisture content in storm systems. As El Niño drives warmer sea surface temperatures over extended periods, tropical cyclones tend to form further eastward than usual and maintain higher intensities for longer durations due to sustained energy input from the oceans.
A Case Study: The Philippines’ Climate Vulnerability
The Philippines, one of the most typhoon-prone nations globally, has experienced a dramatic rise in both frequency and severity of storms under current climate conditions. In September 2023, climatologist Ana Liza Solis, head of climatology at the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA), described the Pacific Ocean as "burning with fever" during an official press briefing held in Manila.
She emphasized that such extreme heat could trigger sudden shifts in storm behavior — including more violent winds or unexpected intensifications — likened to physiological convulsions in humans. This metaphor underscores how elevated ocean temperatures may destabilize atmospheric systems responsible for typhoon formation and movement.
Simulations Reveal a Dangerous Feedback Loop
To assess future risks under warmer climate conditions, researchers at the University of the Philippines conducted simulations modeling the effects of increased sea surface temperature on past major storms, particularly Super Typhoon Haiyan (known locally as Yolanda) from 2013.
These models found that even small increases in global average temperatures could lead to an additional 26% rise in total accumulated rainfall during tropical cyclones. This means that each storm would bring significantly more precipitation — increasing flood risk, soil erosion, and damage potential across vulnerable coastal zones.
The findings are especially alarming for a country like the Philippines, where monsoon rains combined with annual typhoons have long been recognized as primary disaster risks. In recent years, entire cities such as Cagayan Valley or Metro Manila have experienced prolonged flooding events that paralyze daily life and strain emergency services.
Public Response and Government Actions
In response to escalating threats, national authorities in Japan and China have issued public advisories urging citizens to prepare for severe weather conditions during upcoming typhoon seasons.
Japan has officially advised residents to stockpile food supplies and essential items — particularly those needed during extended power outages caused by high winds. It also recommends securing outdoor furniture and structures that could become dangerous projectiles when struck by strong gusts.
China’s Ministry of Emergency Management has directed local officials across provinces to identify geographically vulnerable areas such as low-lying coastal zones or riverine communities. The government is simultaneously upgrading its early warning systems and monitoring networks using satellite data, real-time sensors, and AI-driven forecasting tools aimed at improving response times before storms arrive.
Farmers and Food Security: A Growing Concern
The agricultural sector remains under severe pressure due to repeated flooding events disrupting planting cycles and destroying crops. In the Philippines, for example, riverside farmlands have been repeatedly inundated during monsoon seasons — leading to significant losses in rice production, which forms a critical part of national food supply chains.
To mitigate these impacts, regional governments have increased support mechanisms for farmers, including expanded access to fertilizers, irrigation systems, and emergency crop insurance programs. These measures aim not only to stabilize short-term yields but also to build resilience against future climate shocks.
Long-Term Challenges: A Window Closing on Climate Action
The United Nations Development Programme (UNDP) Asia-Pacific division recently issued an urgent warning that the window for effective policy intervention related to El Niño is rapidly closing.
In their report titled "Climate Resilience in a Warming World," UNDP stated that how severely any community experiences an El Niño event is largely determined years before by decisions made during urban planning and infrastructure development — such as where roads are built, whether drainage systems exist, or if settlements expand into flood-prone zones.
This insight highlights a critical disconnect: while climate events may be predictable on seasonal scales, long-term adaptation depends entirely on governance choices. For instance, building new towns near riverbanks without adequate flood defenses increases exposure to future disasters regardless of storm intensity.
Conclusion: A Region Under Pressure
The current typhoon activity in East Asia reflects not just the natural variability of tropical cyclones but also an intensifying interaction between global warming and regional weather patterns driven by El Niño. With sea surface temperatures at record levels and storms growing stronger and more erratic, coastal communities face unprecedented challenges — both immediate and structural.
While emergency preparedness measures are being implemented across Japan, China, Taiwan, and the Philippines, experts stress that long-term solutions require coordinated investment in resilient infrastructure, transparent governance, and inclusive disaster risk reduction strategies. Without such actions, future generations may inherit a region where climate-driven disasters become routine rather than rare events.