Tropical Storm Jangmi is bringing torrential rain and damaging winds to wide areas of eastern and western Japan, triggering floods and landslides [1, 2].
The simultaneous arrival of multiple weather systems increases the risk of catastrophic infrastructure failure and casualties in coastal regions. The intensity of the rainfall has already disrupted essential services and transportation networks across the archipelago.
Heavy rain began pounding the region on Friday and is expected to continue through Sunday [2, 1]. The storm system has caused widespread disruption, leaving nearly 60,000 households without power [5]. Emergency crews are working to restore electricity as the weather continues to deteriorate.
Meteorologists said that two tropical storms are currently approaching Japan [2]. While Tropical Storm Jangmi is the primary system moving through the region, another system, identified as Storm Mekkhala, was positioned off the western coast [3].
Storm Jangmi is expected to hit the Ryukyu Islands and Okinawa before eventually weakening [4, 3]. The convergence of these systems has created a volatile environment for residents in both western and eastern Japan, where saturated soil increases the likelihood of further landslides [2, 3].
Local authorities have issued warnings for residents in the path of the storms to remain vigilant. The combination of storm surges and inland flooding continues to threaten residential areas and critical infrastructure [1, 5].
“Nearly 60,000 households lost power”
The presence of two simultaneous tropical systems, Jangmi and Mekkhala, creates a compounding effect that exacerbates flooding and instability in Japan's geography. When multiple storms converge, the atmospheric moisture increases, leading to more intense precipitation than a single storm would produce. This puts extreme pressure on Japan's drainage systems and increases the vulnerability of mountainous regions to landslides.
