Flash floods and mudslides in Nan affected about 4,500 households, with Pua, Phu Phiang and Mueang Nan hardest hit. The Commerce Ministry has ordered provincial commerce offices to monitor the supply and prices of drinking water, dry food and daily consumer goods, and told traders not to raise prices, hoard, or refuse sales. Businesses in the north should check stock levels and keep prices at normal. Watch for reports from Phayao, Chiang Mai, Chiang Rai, Phrae and other provinces on the watch list, since flash-flood alerts cover many northern and northeastern areas.