提前部署防汛，北京生活必需品量足价稳

Group 1 - Major supermarkets and fresh e-commerce platforms have implemented flood prevention measures to ensure normal operations and sufficient supply of essential goods during heavy rain in Beijing [1][2][5] - Yonghui Supermarket has increased stock levels of essential items such as water, bread, instant noodles, and vegetables, and has conducted drainage checks to prevent accidents [1][2] - Hema has arranged flood inspections for all stores and increased delivery vehicles and personnel to alleviate pressure on online orders [2] Group 2 - Meituan has issued a weather warning and implemented a policy of exempting delivery riders from penalties for delays during the rain, ensuring that the delivery network operates normally [2] - Major wholesale markets like Xinfadi have organized merchants to prepare for vegetable procurement and transportation, ensuring a stable supply of goods [4] - The Beijing Municipal Bureau of Commerce has proactively prepared for the supply of essential goods, confirming that supplies of meat, eggs, and vegetables are stable and sufficient [5]