Typhoon Kajiki (2025): A Comprehensive Analysis from Formation to Aftermath
Executive Summary: Key Facts
International Name: Typhoon Kajiki
International Number: 2513 (JTWC: WP192025)
Philippine Name: Isang
Naming Origin: Japan, meaning "Swordfish"
Lifespan: August 22 - 26, 2025 (78 hours)
Peak Intensity: Severe Typhoon (150 km/h 10-min avg; 165 km/h 1-min avg)
Minimum Pressure: 950 hPa
Key Impact Zones: Philippines, China (Hainan), Vietnam, Thailand, Laos
Primary Hazards: Destructive winds, extreme rainfall, widespread flooding, landslides
Reported Fatalities: At least 8 (7 in Vietnam, 1 in Thailand)
Estimated Damage: Tens of millions of USD (Preliminary)
The name Kajiki, evoking the swift and pointed swordfish, proved tragically apt for the thirteenth named storm of the 2025 Pacific typhoon season. International number 2513, Kajiki was a storm of dramatic ferocity, characterized by its rapid intensification and a path of destruction that stretched across Southeast Asia. This report provides a detailed analysis of its journey, impacts, and the critical lessons it leaves behind.
1. Formation and Meteoric Rise
The genesis of Kajiki was first identified as a tropical disturbance (designated INVEST 90W) east of the Philippine Eastern Visayas on August 19, 2025. It quickly organized into a tropical depression, making its initial landfall in Casiguran, Aurora Province, Philippines on August 20. The Philippine atmospheric agency, PAGASA, assigned it the local name Isang.
After traversing Luzon, the system emerged into the warm waters of the West Philippine Sea on August 22, where it found the fuel for explosive growth. PAGASA raised Signal No. 1 for northern provinces, an early warning of the impending threat. By the morning of August 23, the China Meteorological Administration (CMA) upgraded it to a tropical storm, bestowing the international name Kajiki.
Kajiki's intensification was remarkably swift. Fueled by high sea surface temperatures, it transformed from a tropical storm into a Severe Typhoon in less than 24 hours.
Key Meteorological Parameters Timeline
| Date/Time (UTC+8) | Position (Lat, Long) | Central Pressure | Max Wind Speed | Intensity |
|-|-|Typhoon Kajiki (2025) was a severe typhoon that originated in the South China Sea, moving westward to northwest, successively affecting the Philippines, Hainan China, Vietnam, Thailand, and Laos. The typhoon brought strong winds, heavy rain, floods, and landslides, causing at least 8 deaths (7 in Vietnam, 1 in Thailand), and causing severe damage to houses, crops, infrastructure, and power systems.
Various governments took large-scale evacuation and emergency measures to respond to the disaster. The China Meteorological Administration stopped numbering "Kajiki" at 17:00 on August 26, marking the end of its lifecycle. This typhoon event once again proved the importance of advance warning, decisive evacuation, and rapid recovery, providing valuable experience for future disaster prevention and mitigation work.