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WEEKLYNewstime
The International News MagazineTOKYO-SEOUL-MANILA-HK
Japan
The new system links weather sensors across the city to give residents earlier, more precise flood alerts before this year's typhoon season begins.
Tokyo's metropolitan government announced on Tuesday the rollout of a new coordinated flood-warning network, designed to give residents earlier and more accurate alerts ahead of the annual typhoon season. The system connects hundreds of river and rainfall sensors across the city into a single monitoring platform for the first time.
Officials said the network replaces a patchwork of separate ward-level systems that often produced delayed or inconsistent warnings during past storms. Under the new setup, data from sensors in low-lying districts will be processed centrally and pushed directly to residents' phones through the city's emergency alert app.
The announcement comes after last year's typhoon season, when flash flooding in several eastern wards caught residents off guard due to warnings arriving less than an hour before water levels rose. City engineers say the new system can extend that warning window to as much as four hours in most scenarios.
Local disaster-preparedness groups have welcomed the upgrade, though some have called for additional investment in evacuation infrastructure to match the improved warning times. A representative from one community group in Koto Ward said faster alerts are only useful if residents also have clear, nearby shelter options.
The metropolitan government said the network will undergo a testing phase over the coming weeks, with full public rollout expected before the start of the typhoon season in late summer. Multilingual alert support, including English and Chinese, is also being added to the app to assist non-Japanese residents.
Engineers involved in the project noted that the system draws on lessons learned from similar flood-monitoring networks used in Osaka and Fukuoka, adapted for Tokyo's denser urban waterways. A public demonstration of the app's new alert features is planned for later this month.
Tokyo's metropolitan government announced on Tuesday the rollout of a new coordinated flood-warning network, designed to give residents earlier and more accurate alerts ahead of the annual typhoon season. The system connects hundreds of river and rainfall sensors across the city into a single monitoring platform for the first time.
Officials said the network replaces a patchwork of separate ward-level systems that often produced delayed or inconsistent warnings during past storms. Under the new setup, data from sensors in low-lying districts will be processed centrally and pushed directly to residents' phones through the city's emergency alert app.
The announcement comes after last year's typhoon season, when flash flooding in several eastern wards caught residents off guard due to warnings arriving less than an hour before water levels rose. City engineers say the new system can extend that warning window to as much as four hours in most scenarios.
Local disaster-preparedness groups have welcomed the upgrade, though some have called for additional investment in evacuation infrastructure to match the improved warning times. A representative from one community group in Koto Ward said faster alerts are only useful if residents also have clear, nearby shelter options.
The metropolitan government said the network will undergo a testing phase over the coming weeks, with full public rollout expected before the start of the typhoon season in late summer. Multilingual alert support, including English and Chinese, is also being added to the app to assist non-Japanese residents.
Engineers involved in the project noted that the system draws on lessons learned from similar flood-monitoring networks used in Osaka and Fukuoka, adapted for Tokyo's denser urban waterways. A public demonstration of the app's new alert features is planned for later this month.
Tokyo's metropolitan government announced on Tuesday the rollout of a new coordinated flood-warning network, designed to give residents earlier and more accurate alerts ahead of the annual typhoon season. The system connects hundreds of river and rainfall sensors across the city into a single monitoring platform for the first time.
Officials said the network replaces a patchwork of separate ward-level systems that often produced delayed or inconsistent warnings during past storms. Under the new setup, data from sensors in low-lying districts will be processed centrally and pushed directly to residents' phones through the city's emergency alert app.
The announcement comes after last year's typhoon season, when flash flooding in several eastern wards caught residents off guard due to warnings arriving less than an hour before water levels rose. City engineers say the new system can extend that warning window to as much as four hours in most scenarios.
Local disaster-preparedness groups have welcomed the upgrade, though some have called for additional investment in evacuation infrastructure to match the improved warning times. A representative from one community group in Koto Ward said faster alerts are only useful if residents also have clear, nearby shelter options.
The metropolitan government said the network will undergo a testing phase over the coming weeks, with full public rollout expected before the start of the typhoon season in late summer. Multilingual alert support, including English and Chinese, is also being added to the app to assist non-Japanese residents.
Engineers involved in the project noted that the system draws on lessons learned from similar flood-monitoring networks used in Osaka and Fukuoka, adapted for Tokyo's denser urban waterways. A public demonstration of the app's new alert features is planned for later this month.
Engineers involved in the project noted that the system draws on lessons learned from similar flood-monitoring networks used in Osaka and Fukuoka, adapted for Tokyo's denser urban waterways. A public demonstration of the app's new alert features is planned for later this month.
