Dangerously hot weather moves into its third day in the Twin Tiers.

The National Weather Service has issued a Heat Advisory, which remains in effect until 10 p.m. July 2. Officials are projecting the heat index values to be between 98 to 104 degrees in the afternoon. Localized higher heat index values are possible in valley locations.

NOAA says a prolonged heat wave will continue through Monday but very warm and humid weather will persist until Thursday, July 5.

Authorities warn heat and humidity will cause heat stress during outdoor exertion or extended exposure.

A Heat Advisory means that a period of hot temperatures is expected. 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.

A National Weather Service advisory instructs people who work or spend time outdoors to take extra precautions like rescheduling strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear light weight and loose fitting clothing when possible and drink plenty of water.

To reduce risk during outdoor work, the Occupational Safety and Health administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency, call 911.

A number of cooling stations are set up throughout the region for residents who do not have air conditioning.  Some options include pools, water parks and public facilities like libraries.

Pet owner are also cautioned that animals can suffer heat related illness and death.  Pets should have access to cool conditions out of the sun and be provided with plenty of cool water.

Never leave anyone, including pets, in a parked car without air conditioning, even if the windows are rolled down. Death could result in a matter of minutes in a hot vehicle.