Forecasters say heat index readings will range from 105 to 110 in parts of the central and eastern parts of North Carolina.
ABC11 Meteorologist Steve Stewart says highs will reach the mid-90s to near 100 once again, but higher humidity has prompted the NWS to issue a Heat Advisory until 9 p.m.
As a cold front drops across the region Thursday, it will settle south of the Triangle into the Sandhills.
"The best chance for a shower or storm will be south across the Sandhills," Stewart said. "The rest of the week will offer typical summer weather with partly sunny skies and highs in the low and mid 90s with a chance for afternoon showers and storms."
Meanwhile, Tropical Storm Emily is still forecast to remain offshore as it tracks parallel to the east coast.