U.S. liquefied natural gas (LNG) export terminals were struggling to bounce back Tuesday after feed gas deliveries in recent days plummeted to their lowest point since the fall amid a historic cold snap gripping much of the country that’s created unprecedented energy demand.

Deliveries to the terminals via interstate pipelines fell to 5.45 Bcf Monday, down from 9.16 Bcf on Friday, according to NGI data. The declines have been driven by facilities along the Gulf Coast, where some of the worst winter weather has touched down in an otherwise temperate part of the country. Nominations had bounced back by 2 Bcf day/day on Tuesday and were at 7.70 Bcf. 

However, a return to normalcy is tenuous for now as record cold was again expected in Texas on Tuesday. The forecast in the South...