DIVERNON, Ill. (AP) — Fiery crashes that killed seven people and injured almost 40 along a stretch of interstate highway in central Illinois came as high spring winds kicked up dust while farmers were busy tilling or planting their fields. As darkness enveloped them Monday, cars and trucks hurtling down the road slammed into one another and ended up mangled or in some cases burned. The director of the Illinois State Police said Tuesday that the circumstances that led to the crashes “were very unusual.” Investigators are very early in their inquiry and have a lot of evidence to review and people to interview as part of their probe.