Typhoon Jangmi is moving northward across East Asia, bringing heavy rain and stormy seas to southern Japan and the Korean peninsula.
The storm's movement creates a volatile weather pattern that threatens infrastructure in Japan and disrupts daily life in South Korea through extreme temperature swings.
In Japan, the typhoon has caused significant disruptions to travel and utilities. Approximately 600 flights were cancelled [2], and tens of thousands of people lost power [2]. In the Okinawa region, about 17,000 households were left without electricity [2]. The southwestern Kagoshima region saw more than 30,000 households lose power [2]. Local reports said nine people were injured [2].
The storm's impact extends to the Korean peninsula, where it is bringing moist air that results in heavy precipitation. In eastern Jeju, rainfall intensity reached nearly 40 mm per hour [1]. These conditions have created stormy seas and heavy rain across southern regions of the country [3].
While the south faces flooding risks, central Korea is experiencing a heatwave. The circulation of Typhoon Jangmi is drawing hot, humid air into the central regions, pushing temperatures in Seoul to 33 °C [1, 3]. This atmospheric shift has created a stark contrast between the rain-soaked south and the sunny, hot conditions in the capital city [3].
Meteorologists said that the typhoon's northward trajectory is the primary driver for both the heavy rainfall in the south and the heat accumulation in the north [3].
“Approximately 600 flights were cancelled”
The simultaneous occurrence of a heatwave in Seoul and torrential rain in Jeju and Japan illustrates how large-scale tropical cyclones can distort regional weather patterns. By pulling hot air into central Korea while pushing moisture into the south, Typhoon Jangmi demonstrates the complex atmospheric circulation that can lead to dual crises—infrastructure failure from flooding and public health risks from extreme heat—within the same geographic region.
