Cold Air Surge Brings Heavy Rain and Temperature Drop Across Northern Vietnam

A cold air mass moved southward from the north on the night of 8 June, reaching the mountainous areas of northern Vietnam and later spreading to the east‑north, west‑north and north‑central regions. The National Center for Hydro‑Meteorological Forecasting warned that the surge would produce heavy rain, thunderstorms and strong east‑north winds (4‑5 on the Beaufort scale, gusts up to 7) over a wide area.

Temperatures fell 7‑10 °C, with minimums of 22‑25 °C across the plains and sub‑21 °C on the highlands. Rainfall totals were forecast at 80‑160 mm in many districts, with isolated reports of more than 250 mm, creating a high risk of flash floods, landslides and coastal wave action. Authorities in provinces such as Thanh Hóa issued civil‑defence notices, urging monitoring of river levels, evacuation of vulnerable communities and readiness of rescue teams.

The weather shift also ended a heatwave that had seen daytime highs of up to 40 °C in the north and central regions. In the southern part of the country, Ho Chi Minh City and neighboring provinces experienced evening rain showers and thunderstorms, with similar hazards of strong gusts, hail and localized flooding.