The Meteorological Department reported southerly and southeasterly winds would bring humidity from the Gulf of Thailand to upper Thailand, causing scattered thunderstorms with gusting winds. A maritime warning is in effect with ocean swells of two metres.

The department warned North, Northeast and Central residents to be alert for thunderstorms from Monday to Thursday and to secure homes and other buildings.

In Angthong's Wiset Chai Chan district 70 families are homeless after storms destroyed their houses.

Pornpilai Pongchangyoo, 45, whose house was destroyed, said she and her husband had hung on for their lives when the storm hit.

"Last year we were hit by floods that forced us to sleep on the roof for a month, but we still had a place to live. Now our whole house is gone; we have nowhere else to go," she lamented.

There were no reports of fatalities or injuries.

Local poultry farms at Tambon Bang Chak reported hundreds of chickens killed.

Officials are inspecting damage and assisting those affected.

Meanwhile Nakhon Sawan is in the grip of drought. About 10,000 rai of off-season rice was damaged, and six districts were declared disaster areas. They are Krok Phra, Banphot Phisai, Chumsaeng, Nong Bua, Kao Lieo and Mae Pearn.

In Kalasin drought has reduced water volume in the Lam Pao dam in Sahatsakhan district to 679 million cubic metres, 48 per cent of capacity. The shortage will affect 200,000 rai of off-season rice.