
気象庁が1日発表した9月の天候まとめで、台風や秋雨前線の影響により東日本の太平洋側の降水量が平年比236%となり、1946年の統計開始以来最多を記録したことが明らかになった。
AI-generated summary
台風や秋雨前線の影響により、東日本の太平洋側などで記録的な大雨や日照不足となった。
気象庁は1日、9月の天候まとめを発表した。台風や秋雨前線などの影響で、東日本の太平洋側では9月の降水量が平年比236%に上り、1946年の統計開始以来、最多を記録した。
東京都心で34日連続の雨、1886年以降で最長に 気象庁
気象庁の藤川典久予報官は、本州付近に停滞した秋雨前線に向かい、太平洋高気圧の縁と日本の南海上の大規模な低圧部の東縁から、暖かく湿った空気が流れ込み続けたと説明。これにより前線の活動が活発になったという。
また、台風25号の影響で、関東甲信地方を中心に記録的な大雨となった所もあり、千葉や東京など12地点では、9月の降水量の最多記録を更新した。
日照時間は北日本(北海道と東北)の日本海側で多く、東・西日本でかなり少なかった。特に東日本の太平洋側は平年比46%で、統計開始以来、9月として最少となった。沖縄・奄美は平年並みだった。

Forest fires in Indonesia's Kalimantan Island and other areas are becoming more serious, with the main causes being burning for land clearing and dryness caused by the El Niño phenomenon. Approximately 900,000 hectares have been burned so far this year, and the haze is causing air pollution and health problems in Malaysia and Singapore. Both countries offered support and requested stronger measures, and ASEAN began talks.

The 31st Conference of the Parties to the United Nations Framework Convention on Climate Change (COP31) to combat global warming will be held in Antalya, Turkey from November 9th. The main focus will be on achieving the 1.5 degrees Celsius target, accelerating greenhouse gas reductions, and strengthening support for developing countries.

The Ministry of Land, Infrastructure, Transport and Tourism announced on the 6th, in response to the underpass flooding accident caused by record heavy rain, that remote gates will be installed in locations with a particularly high risk of flooding, and that advance traffic restrictions will be implemented when disaster prevention weather information equivalent to Alert Level 4 is announced or when rainfall reaches a certain amount per hour. Minister of Land, Infrastructure, Transport and Tourism Tatsunori Ibayashi stated that effective measures will be taken promptly.

On September 30, the European Union's Copernicus Atmospheric Monitoring Service announced that from January to August 2026, about 40% of the world's population was exposed to ground-level ozone, which is harmful to health. The combination of extreme heat and anthropogenic air pollution has caused concentrations to rise, with 60% of the population in Asia in particular exposed to ``extremely bad'' levels, reaching 90% if you include bad and very bad levels.

On the 28th, Environment Minister Hiroyoshi Sasakawa expressed his intention to support local governments that introduce bear tracking using AI and drones as a countermeasure against bear damage. He also stated that he would work to foster public understanding through national park visitor centers in order to expand the recycling of soil decontaminated from the Fukushima Daiichi nuclear power plant accident.

On the 24th, Chiba Prefecture announced that 884 homes, both above and below the floors, were damaged by flooding due to the heavy rains caused by Typhoon No. 25. In the area around Inbanuma, levees have burst and floods have occurred, and drainage work has not been able to keep up and there are areas where the water is not receding.