European natural-gas prices rise on uncertainty over supplies amid disruptions in the Middle East and record heat across parts of Europe. Italy's energy firm Edison said Tuesday that QatarEnergy extended force majeure on some LNG shipments, with a total of 21 LNG cargoes now subject to the clause over the delivery period from April to early September. "The latest notice extends the affected delivery period through early September, increasing pressure on Edison to continue sourcing replacement cargoes from the spot market and alternative suppliers during the peak summer storage injection season," Kpler analysts say. This comes as extreme heat hits several countries in Europe, lifting cooling demand and energy consumption. In early trading, the benchmark Dutch TTF contract is up 1.8% to 44.46 euros a megawatt-hour. (giulia.petroni@wsj.com)