Meteorologist Jon Hitchcock with the National Weather Service in Buffalo says an approaching cold front will arrive Saturday, although it will still be warm and humid, temperatures should be in the mid 80s. But by Sunday, he says, the high will be in the upper 70s with much lower humidity.
It's that humidity which has been impressive this week, and western New York rarely sees humidity levels this high for a prolonged period of time.
He says very warm and humid conditions for three days in a row qualifies as a heat wave -- we'll have had six days in a row by the time some relief arrives Sunday.
Hitchcock adds it's important for people out in this kind of weather for an extended period of time to take breaks in the shade, and stay hydrated.