Most of Ohio is under a heat advisory with temperatures that will feel 100-plus. Here's the difference between a heat advisory, heat watch and heat warning.

Both the temperatures and the humidity will soar Friday, Radell said. Temperatures will reach the mid-90s in most areas and heat indexes, or what the temperatures will feel like, will range from the mid-90s on the North Fork to the low 100s in western Nassau. The forecast calls for a chance of showers and thunderstorms Friday afternoon and evening.