美国冬季风暴造成至少30人死亡

Group 1 - A large winter storm has swept across many parts of the United States, resulting in significant snowfall and low temperatures [1][2] - The storm has caused at least 30 fatalities across various states, including New York, Texas, Arkansas, Massachusetts, Pennsylvania, and Kansas [2] - As of January 26, nearly 700,000 users were without power due to the storm, with significant outages reported in the southern regions [2] Group 2 - Despite increased electricity demand due to the storm, electricity prices in Chicago fell into negative territory, reaching -$227.93 per megawatt-hour [4] - The negative pricing occurred because long-distance transmission lines were at full capacity, preventing excess electricity from being delivered to other markets [4] Group 3 - Natural gas futures prices surged due to the winter storm, with the February contract exceeding $7 per million British thermal units, peaking at $7.439 [7] - The contract price saw a cumulative increase of approximately 70% over the past week, marking the largest weekly gain since records began in 1990 [7]