🔑 Key Takeaways
- Global extreme heatwaves in 2025 caused over 1,300 excess deaths in various regions, raising serious concerns for 2026.
- BMKG confirms these phenomena are triggered by climate change and complex global weather patterns, including persistent El Niño and a positive Indian Ocean Dipole (IOD).
- Indonesia is highly vulnerable to similar heat events due to its tropical climate, urban heat island effect, and dense population, necessitating urgent health preparedness.
JAKARTA – The world is once again gripped by the threat of extreme heatwaves. After 2025 recorded unprecedented high temperatures across various parts of the globe, leading to thousands of excess deaths, attention has now shifted to the potential recurrence of similar phenomena in 2026, especially in tropical countries like Indonesia. The Indonesian Agency for Meteorology, Climatology, and Geophysics (BMKG) has issued a serious warning regarding the triggers of these heatwaves and their potentially deadly impact on the nation.
Triggers of the 2026 Global Heatwaves: BMKG Analysis
According to BMKG’s analysis, the heatwaves affecting various countries are no longer mere anomalies but strong indicators of the intensifying impacts of global climate change. “This phenomenon is a direct manifestation of global warming causing a significant increase in the Earth's average surface temperature,” explained Dr. Dwikorita Karnawati, Head of BMKG, at a press conference in early 2026. She added that factors such as a persistent El Niño and a positive phase of the Indian Ocean Dipole (IOD) further exacerbate conditions, driving up sea and land surface temperatures.
BMKG elaborated that a heatwave occurs when a region experiences temperatures significantly above its normal average for several consecutive days. In Europe, for instance, early 2026 reports from health organizations indicated that heatwaves in 2025 had led to over 1,300 excess deaths. This figure serves as a grim reminder of the latent dangers brought by the climate crisis.
Threat of Excess Deaths and Vulnerable Groups
The health impacts of heatwaves are profoundly serious. Extreme temperature increases can trigger various health problems, ranging from dehydration and heat exhaustion to life-threatening conditions like heatstroke. Vulnerable groups such as the elderly, children, pregnant women, individuals with chronic diseases (heart, lung, diabetes), and outdoor workers are most at risk.
“When the body's core temperature rises too high, vital organs like the brain, heart, and kidneys can suffer permanent damage or even failure. This is a medical emergency requiring immediate attention,” stated Professor Dr. Santi Putri, an epidemiologist and public health expert from the University of Indonesia. She emphasized the importance of public education on symptoms and preventive measures.
Indonesia in the Eye of the Climate Crisis: BMKG Analysis
The pressing question is: could similar heatwave phenomena strike Indonesia? BMKG asserts that while Indonesia has a tropical climate with high humidity, which naturally differs slightly from the characteristics of heatwaves in subtropical regions, the potential threat remains. “Indonesia rarely experiences heatwaves in the classic definition, but we are highly vulnerable to extreme temperatures exacerbated by the urban heat island effect in major cities,” said Dr. Ardhasena Sopaheluwakan, Deputy for Climatology at BMKG.
He explained that the combination of high temperatures and extreme humidity in Indonesia can create a dangerously high heat index, increasing the risk of heatstroke even at temperatures not formally classified as a heatwave. BMKG scenarios indicate that if certain atmospheric conditions, such as air blocks or high-pressure anomalies, occur during a prolonged dry season, a surge in excess deaths comparable to European cases is not impossible.
Mitigation and Health Preparedness
Facing this threat, BMKG and the Ministry of Health have intensified coordination to develop more effective early warning systems. The public is urged to always follow the latest weather and climate information from official sources. Individual preventive measures include: staying hydrated by drinking sufficient water, avoiding strenuous outdoor physical activity during peak heat hours, wearing loose-fitting and light-colored clothing, and seeking shade or air-conditioned spaces when possible.
Local governments are also encouraged to prepare public facilities that can serve as 'cooling centers' during extreme conditions. “Preparedness is key. We must ensure our healthcare system is ready to handle a surge in heat-related cases, and that the public is educated to protect themselves,” concluded Professor Dr. Santi Putri.
Frequently Asked Questions
- Has Indonesia ever experienced a heatwave?
- By the classic definition of a heatwave (temperatures significantly above average for several days), it is rare in Indonesia due to its tropical climate. However, Indonesia is very susceptible to extreme hot temperatures combined with high humidity, which can lead to a dangerous heat index.
- What is the difference between a heatwave and extreme hot temperatures in Indonesia?
- A heatwave refers to a period of abnormally high temperatures above historical averages for several consecutive days, typically occurring in subtropical regions. In Indonesia, we more commonly face "extreme hot temperatures" exacerbated by high humidity, creating conditions that feel much hotter and are dangerous.
- How can one protect themselves from the effects of extreme heat?
- Drink plenty of water regularly, avoid strenuous outdoor physical activity during midday, wear loose-fitting, light-colored clothing, seek shade or air-conditioned spaces, and monitor weather information from BMKG. Be aware of symptoms of dehydration or heatstroke.
