Ishikawa Prefecture: Heatstroke Alert Erroneously Issued, Meteorological Agency Investigates Cause

An erroneous 'Heatstroke Alert' was issued for Ishikawa Prefecture early on August 29th, causing confusion among residents. The alert, which signaled an extremely high risk of heatstroke, was jointly released around 5 a.m. by the Japan Meteorological Agency (JMA) and the Ministry of the Environment.

However, it was later discovered that the alert was based on a calculation error. Officials at the Meteorological Observatory made a mistake while computing the 'Effective Temperature,' a key metric used to assess heat-related risks. This error led to the premature and incorrect issuance of the warning.

The JMA has stated that an investigation into the cause of the miscalculation is underway. The agency aims to understand how the error occurred and implement measures to prevent similar incidents in the future. The incident highlights the importance of accuracy in meteorological data and public warnings, especially during periods of high temperatures.