A fast-moving grass fire swept toward homes near here Tuesday evening but was stopped by a triple-alarm response that included aerial water drops and dozens of firefighters. The fire threatened about 20 homes and may have started along Highway 28 when a vehicle lost its tire and wheel and sparks ignited grass and brush, said Grant County Sheriff’s Office spokesman Kyle Foreman. Firefighters were able to contain the fire between the highway and BNSF Railway tracks despite strong winds and dry vegetation. There were no reports of damaged homes and no reports of injuries to firefighters or residents. The fire was declared under control two hours after it was first reported at about 6 p.m.