UPDATE: Heat advisory issued for North Texas until Thursday night, according to the NWS

The NWS Fort Worth TX issued an updated heat advisory at 1:01 p.m. on Thursday. The advisory is for Wise, Denton, Collin, Parker, Tarrant, Dallas, Rockwall, Kaufman, Johnson, Ellis, Henderson, Navarro, Freestone and Anderson counties.

Heat index values up to 109 degrees for portions of north central and northeast Texas until 9 p.m. this evening.

"Hot temperatures and high humidity will increase the risk for heat-related illnesses to occur, particularly for those working or participating in outdoor activities," describes the NWS.

This advisory is in effect until 9 p.m.

Protect yourself during a heat wave with these tips from the NWS

• Consume plenty of fluids to stay hydrated.

• Seek shelter: Stay indoors in an air-conditioned room to keep cool.

• Stay out of the sun, and check up on relatives and neighbors.

• Protect your little ones and furry friends: Never leave young children and pets alone in vehicles, especially during hot weather when car interiors can become dangerously hot in a matter of minutes.

• Take extra precautions outdoors: If you work or spend time outside, be sure to take additional safety measures.

• Time your activities wisely: When possible, reschedule strenuous activities to early morning or evening.

• Recognize warning signs: Know the signs and symptoms of heat exhaustion and heat stroke.

• Stay cool with clothing: Wear lightweight and loose-fitting clothing.

To ensure safety during outdoor work, adhere to the Occupational Safety and Health Administration (OSHA)'s recommendations by incorporating regular rest breaks in shaded or air-conditioned environments. If someone is affected by heat, immediately transfer them to a cool and shaded area. In an emergency, call 911.

Source: The National Weather Service