It’s a rite of spring and summer: steeling yourself for the onslaught of tiny but potentially devastating ticks that spread diseases like Lyme and Rocky Mountain spotted fever. This summer could be one of the worst seasons in memory as risk factors collide, experts say. Climate change is leading to warmer winters—this past winter was one of the warmest on record —which provide more fertile conditions for ticks to breed and hatch. Warmer temperatures in traditionally colder regions of the world