County: Collin
Issued: 5:09 AM - Tue, Aug 11, 2026
Begins: 5:09 AM - Tue, Aug 11, 2026
Expires: 4:00 PM - Tue, Aug 11, 2026

* WHAT...Heat index values up to 106 expected.

* WHERE...Most of North Texas.

* WHEN...From 1 PM to 8 PM CDT Tuesday.

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

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. 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 9 1 1.

County: Dallas
Issued: 5:09 AM - Tue, Aug 11, 2026
Begins: 5:09 AM - Tue, Aug 11, 2026
Expires: 4:00 PM - Tue, Aug 11, 2026

* WHAT...Heat index values up to 106 expected.

* WHERE...Most of North Texas.

* WHEN...From 1 PM to 8 PM CDT Tuesday.

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

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. 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 9 1 1.

County: Denton
Issued: 5:09 AM - Tue, Aug 11, 2026
Begins: 5:09 AM - Tue, Aug 11, 2026
Expires: 4:00 PM - Tue, Aug 11, 2026

* WHAT...Heat index values up to 106 expected.

* WHERE...Most of North Texas.

* WHEN...From 1 PM to 8 PM CDT Tuesday.

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

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. 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 9 1 1.

County: Ellis
Issued: 5:09 AM - Tue, Aug 11, 2026
Begins: 5:09 AM - Tue, Aug 11, 2026
Expires: 4:00 PM - Tue, Aug 11, 2026

* WHAT...Heat index values up to 106 expected.

* WHERE...Most of North Texas.

* WHEN...From 1 PM to 8 PM CDT Tuesday.

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

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. 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 9 1 1.

County: Johnson
Issued: 5:09 AM - Tue, Aug 11, 2026
Begins: 5:09 AM - Tue, Aug 11, 2026
Expires: 4:00 PM - Tue, Aug 11, 2026

* WHAT...Heat index values up to 106 expected.

* WHERE...Most of North Texas.

* WHEN...From 1 PM to 8 PM CDT Tuesday.

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

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. 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 9 1 1.

County: Kaufman
Issued: 5:09 AM - Tue, Aug 11, 2026
Begins: 5:09 AM - Tue, Aug 11, 2026
Expires: 4:00 PM - Tue, Aug 11, 2026

* WHAT...Heat index values up to 106 expected.

* WHERE...Most of North Texas.

* WHEN...From 1 PM to 8 PM CDT Tuesday.

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

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. 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 9 1 1.

County: Parker
Issued: 5:09 AM - Tue, Aug 11, 2026
Begins: 5:09 AM - Tue, Aug 11, 2026
Expires: 4:00 PM - Tue, Aug 11, 2026

* WHAT...Heat index values up to 106 expected.

* WHERE...Most of North Texas.

* WHEN...From 1 PM to 8 PM CDT Tuesday.

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

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. 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 9 1 1.

County: Rockwall
Issued: 5:09 AM - Tue, Aug 11, 2026
Begins: 5:09 AM - Tue, Aug 11, 2026
Expires: 4:00 PM - Tue, Aug 11, 2026

* WHAT...Heat index values up to 106 expected.

* WHERE...Most of North Texas.

* WHEN...From 1 PM to 8 PM CDT Tuesday.

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

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. 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 9 1 1.

County: Tarrant
Issued: 5:09 AM - Tue, Aug 11, 2026
Begins: 5:09 AM - Tue, Aug 11, 2026
Expires: 4:00 PM - Tue, Aug 11, 2026

* WHAT...Heat index values up to 106 expected.

* WHERE...Most of North Texas.

* WHEN...From 1 PM to 8 PM CDT Tuesday.

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

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. 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 9 1 1.

County: Wise
Issued: 5:09 AM - Tue, Aug 11, 2026
Begins: 5:09 AM - Tue, Aug 11, 2026
Expires: 4:00 PM - Tue, Aug 11, 2026

* WHAT...Heat index values up to 106 expected.

* WHERE...Most of North Texas.

* WHEN...From 1 PM to 8 PM CDT Tuesday.

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

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. 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 9 1 1.