At 11:58 a.m. on Tuesday, the National Weather Service released an extreme heat warning valid from Wednesday 11 a.m. until Friday 8 p.m. for Yates, Seneca, Cayuga, Onondaga, Steuben, Schuyler, Chemung, Tompkins, Madison, Oneida, Cortland, Chenango, Tioga and Broome counties."Dangerously hot conditio ns with heat index values up to 105 degrees expected," comments the weather service. "The hottest temperatures will be in urban valley locations during the mid to late afternoon timeframes when the heat index could climb as high as 105 to 110 degrees." ...read more read less