Prolonged exposure to magnetic fields — high voltage power lines, electric blankets and other appliances — linked to a type of childhood leukemia: Study Updated: Feb. 21, 2023, 1:20 p.m.

As Del Oehme approached the power lines running by the Houston Police Department in Kingwood, the numbers on the Gaussmeter in his hand started rising from 4.8 milligauss (mG) and finally settled ...