Storm Wipha threatens the region with intense rainfall exceeding 600mm and raises the risk of flash floods and landslides.

Satellite imagery can help determine the strength, size and cohesion of a storm. The stronger a storm becomes, the more likely an eye will form in the center. When the eye looks symmetrical, that often means the storm is not encountering anything to weaken it.

Typhoon Wipha is closing in on northern Vietnam, with its erratic path prompting urgent preparations in Quang Ninh province.

From July 20 to 29, Typhoon No. 3 (Wipha) is forecast to bring heavy to extremely heavy rainfall to northern Vietnam and north-central provinces, especially from Thanh Hoa to Ha Tinh. The central region will see a gradual decline in heat, while the southern region is expected to experience afternoon and evening rain.