CNBC's Pippa Stevens explains why natural gas prices are up about 60% this week and pacing for their best week on record ahead of an Arctic blast. She cites short covering, a surge in heating demand, and the risk of production freeze-offs in the Marcellus and Utica shales, with Citi estimating an 80 Bcf supply loss. She also highlights that EQT, Range Resources, and Coterra are among the most unhedged producers per Mizuho and could capture more upside, while noting hedging and equipment-freeze risks can tighten the market.