A brief period of almost fall-like weather is over as hot, humid conditions return to the Twin Tiers.

The National Weather Service in Binghamton says an unusually hot and humid air mass will build over the region through Wednesday, August 29. Heat indices will push into lower to mid 90s for much of the area August 27 then upper 90s to near 100 on Tuesday and Wednesday.

The National Weather Service in Binghamton has issued a Heat Advisory, which is in effect from 11 a.m. to 8 p.m. August 28.

Officials say the area could experience Heat Index Values of 95 to 104 Tuesday afternoon, due to temperatures in the upper 80s to lower 90s and dewpoints in the lower 70s.

NOAA says the highest Heat Index values can be expected in the afternoon August 28.  Very warm and humid conditions will continue into Wednesday for much of the area.The heat and humidity may cause heat stress during outdoor exertion or extended exposure. Officials warn the combination of hot temperatures and high humidity will combine to create a situation in which heat illnesses are possible. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Many schools in Northeast Pennsylvania are already back in session with students looking at dealing with the summer-like conditions in some buildings that lack air conditioning.

Meanwhile, there are some schools in the northern portion of the Keystone State that did not start the school year last week as had been scheduled due to mold and other damage from recent flooding.

There are still several roads in Bradford County, Pennsylvania that the Pennsylvania Department of Transportation says could be closed “long-term” due to damage from weeks of flash flooding. PennDOT has also listed close to a half dozen roads in Susquehanna County that are being at least partially closed through August 31 for crews to repair flood damage.