7.4℃，冻得发紫！上海多区发布低温、霜冻预警，东北网友：酒店像冰窖

Core Points - Shanghai experienced its first "ice point day" of the winter, with temperatures dropping to -7.4°C, leading to widespread frost and low-temperature warnings across multiple districts [18][20] - The cold weather has affected not only tourists but also local agriculture, with reports of frost damage to outdoor crops and even freezing of cosmetic products like makeup remover [7][9] - Residents have reported significant impacts from the cold, including ice formation on vehicles and water containers, indicating severe weather conditions [11][13] Summary by Category - Weather Conditions - A strong cold front has led to temperatures in areas like Chongming and Jinshan dropping below -7°C, with the lowest recorded at -7.4°C in Chongming [18] - Multiple districts issued yellow warnings for low temperatures and frost, indicating the severity of the weather [18] - Impact on Agriculture - Outdoor crops, particularly leafy vegetables, have suffered frost damage, with reports of ice forming on the leaves [9] - The cold has also affected local water supplies, with water in outdoor containers freezing [13] - Public Reaction - Tourists and residents expressed discomfort with the cold, with comments highlighting the extreme conditions in hotels and public spaces [5][20] - Social media reactions reflect a sense of helplessness among residents facing the harsh weather [5]