The National Weather Service has issued a heat advisory for Wednesday for northeastern North Carolina for heat index readings that could approach between 105 and 109 degrees.
An air quality alert is also in effect for counties in the Research Triangle, Fayetteville and Rocky Mount areas.
Forecasters say the hottest temperatures and highest heat indices will occur between 1 p.m. and 6 p.m.
"A good deal of sunshine will aid the temperature rise, and only a few places will get a cooling thunderstorm during the afternoon. Fueled by the intense heat, any thunderstorm that does form can bring a heavy downpour and gusty winds," ABC11 Meteorologist Don Schwenneker said. " Sultry conditions tonight will be followed by another hot and humid day tomorrow."
Prolonged exposure to the heat or any strenuous outdoor activity could lead to heat-related illnesses that may require medical attention.