National Day for Disaster Prevention and Reduction, by the Task Force on the Towns of the Incheon Commune in the City of Hanoi How can calamity be detected in meteorological early warning? On 12 May this year, the 15th National Day for Disaster Prevention and Mitigation, the Department of Meteorology of the Commune Town Task Force of the City of Guyango, in the city of Hanoi, took part in the city’s secondary school, offering meteorological disaster prevention and mitigation and astronomical ...