A natural gas leak in explosive range forced Lawrence, Mass. residents to evacuate their homes early on Sept. 27, according to electric utility National Grid, which cut power to more than 1,300 customers to avoid another disaster like last year's natural gas explosions and fires in Lawrence and two other towns north of Boston. The leak came just days after federal officials called for changes to national pipeline regulations as they released a final report on the causes of the Sept. 13, 2018, disaster.