📌 Why in News?
A research analysis released on 13 April 2026 reveals that Marine Heatwaves (MHWs) are intensifying tropical cyclones, leading to a 60% rise in billion-dollar disasters globally.
🔥 Key Highlights
🔹 Economic Impact:
- Cyclones linked to MHWs cause 60% more billion-dollar disasters
- Higher damage due to strong winds & storm surges
🔹 Rapid Intensification (RI):
- Defined as ≥ 30 knots (~55 km/h) wind increase
- MHWs increase chances of cyclones intensifying before landfall
🔹 Geographic Hotspots:
- Most affected regions:
- Bay of Bengal
- Arabian Sea
- Also observed in:
- North Indian Ocean
- North Atlantic
- East Pacific
🔹 Trends & Data:
- Average 1–1.5 MHW events/year
- Increase in cyclone activity since 2005
- Data studied from 1981–2023
🔹 Environmental Drivers:
- Rising sea surface temperatures
- Increased atmospheric moisture
- 👉 Leads to stronger storms
📚 Additional Information
🔸 Marine Heatwaves (MHWs):
- Long periods of abnormally warm ocean water
- Act as energy source for cyclones
🔸 Tropical Cyclones:
- Powerful storm systems over oceans
- Gain strength from warm sea temperatures
🧠 Why Important for Exams (UPSC / SSC / Geography)
- Important topic from Environment + Geography
- Questions asked on:
- Cyclones
- Climate change
- Ocean warming
- Very relevant for UPSC Prelims + SSC GD
⚡ One Line Revision
👉 Marine Heatwaves are increasing the intensity of tropical cyclones, leading to 60% more economic disasters.
🔍 Keywords for Google Search (SEO)
Marine Heatwaves UPSC, cyclone intensification 2026, Bay of Bengal cyclone study, climate change cyclones India, SSC GD geography current affairs, tropical cyclone rapid intensification
❓ FAQs (Google Featured Snippet Target)
Q1. What are Marine Heatwaves?
👉 Periods of abnormally high ocean temperatures
Q2. What is Rapid Intensification (RI)?
👉 Increase in wind speed by ≥30 knots
Q3. Which regions are most affected?
👉 Bay of Bengal & Arabian Sea
🇮🇳 समुद्री हीटवेव से चक्रवात और अधिक खतरनाक हो रहे हैं
📌 क्यों चर्चा में?
13 अप्रैल 2026 की रिपोर्ट के अनुसार Marine Heatwaves चक्रवातों को अधिक शक्तिशाली बना रही हैं।
🔥 मुख्य बिंदु
- 60% अधिक नुकसान
- चक्रवात तेजी से मजबूत हो रहे
- बंगाल की खाड़ी और अरब सागर सबसे प्रभावित
📚 अतिरिक्त जानकारी
- समुद्र का तापमान बढ़ना मुख्य कारण
🎯 परीक्षा हेतु महत्वपूर्ण बिंदु
- RI: 30 knots
- क्षेत्र: Bay of Bengal
📝 Practice MCQs (English + Hindi)
1. Marine Heatwaves affect which system?
MHWs किसे प्रभावित करते हैं?
A. Rivers
B. Cyclones
C. Forests
D. Mountains
👉 Answer: B
2. Disaster increase due to MHWs?
नुकसान कितना बढ़ा?
A. 20%
B. 40%
C. 60%
D. 80%
👉 Answer: C
3. RI means?
RI का मतलब क्या है?
A. Rain increase
B. Rapid Intensification
C. River impact
D. None
👉 Answer: B
4. RI threshold is?
RI की सीमा क्या है?
A. 20 knots
B. 25 knots
C. 30 knots
D. 40 knots
👉 Answer: C
5. Most affected region?
सबसे प्रभावित क्षेत्र?
A. Himalaya
B. Bay of Bengal
C. Sahara
D. Arctic
👉 Answer: B
6. MHW frequency per year?
प्रति वर्ष MHW कितनी होती है?
A. 0.5
B. 1–1.5
C. 2–3
D. 5
👉 Answer: B
7. Study period was?
अध्ययन अवधि क्या थी?
A. 1990–2020
B. 1981–2023
C. 2000–2025
D. 2010–2026
👉 Answer: B
8. Main driver of cyclones?
चक्रवात का मुख्य कारण?
A. Cold water
B. Warm water
C. Wind
D. Soil
👉 Answer: B
9. Arabian Sea is located in?
अरब सागर कहाँ है?
A. Europe
B. Asia
C. Africa
D. America
👉 Answer: B
10. Cyclones form over?
चक्रवात कहाँ बनते हैं?
A. Land
B. Ocean
C. Desert
D. Forest
👉 Answer: B