LAWRENCE, Mass. — A series of gas explosions an official described as “Armageddon” killed a teenager, injured at least 10 other people and ignited fires in at least 39 homes in three communities north of Boston on Thursday, forcing entire neighborhoods to evacuate as crews scrambled to fight the flames and shut off the gas.

Authorities said Leonel Robson, 18, of Lawrence, died after a chimney toppled by an exploding house crashed into his car. He was rushed to a Boston hospital but pronounced dead there in the evening.