County: Collin
Issued: 12:57 AM - Mon, Aug 17, 2026
Begins: 12:57 AM - Mon, Aug 17, 2026
Expires: 1:00 PM - Mon, Aug 17, 2026

* WHAT...Heat index values up to 107 and temperatures up to 105.

* WHERE...Most of North Texas.

* WHEN...Until 8 PM CDT this evening.

* 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.

Take extra precautions when outside by staying hydrated, wearing
lightweight and loose fitting clothing, and limiting strenuous
activities to the early morning or evening. Check up on relatives and
neighbors. Never leave young children or pets in an enclosed vehicle,
even for a short time, as temperatures can quickly rise to
life-threatening levels.

Know the signs and symptoms of heat exhaustion and heat stroke. To
reduce risk when outdoors, 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 ASAP if you or someone you know is exhibiting signs of heat
stroke.

County: Dallas
Issued: 12:57 AM - Mon, Aug 17, 2026
Begins: 12:57 AM - Mon, Aug 17, 2026
Expires: 1:00 PM - Mon, Aug 17, 2026

* WHAT...Heat index values up to 107 and temperatures up to 105.

* WHERE...Most of North Texas.

* WHEN...Until 8 PM CDT this evening.

* 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.

Take extra precautions when outside by staying hydrated, wearing
lightweight and loose fitting clothing, and limiting strenuous
activities to the early morning or evening. Check up on relatives and
neighbors. Never leave young children or pets in an enclosed vehicle,
even for a short time, as temperatures can quickly rise to
life-threatening levels.

Know the signs and symptoms of heat exhaustion and heat stroke. To
reduce risk when outdoors, 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 ASAP if you or someone you know is exhibiting signs of heat
stroke.

County: Denton
Issued: 12:57 AM - Mon, Aug 17, 2026
Begins: 12:57 AM - Mon, Aug 17, 2026
Expires: 1:00 PM - Mon, Aug 17, 2026

* WHAT...Heat index values up to 107 and temperatures up to 105.

* WHERE...Most of North Texas.

* WHEN...Until 8 PM CDT this evening.

* 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.

Take extra precautions when outside by staying hydrated, wearing
lightweight and loose fitting clothing, and limiting strenuous
activities to the early morning or evening. Check up on relatives and
neighbors. Never leave young children or pets in an enclosed vehicle,
even for a short time, as temperatures can quickly rise to
life-threatening levels.

Know the signs and symptoms of heat exhaustion and heat stroke. To
reduce risk when outdoors, 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 ASAP if you or someone you know is exhibiting signs of heat
stroke.

County: Ellis
Issued: 12:57 AM - Mon, Aug 17, 2026
Begins: 12:57 AM - Mon, Aug 17, 2026
Expires: 1:00 PM - Mon, Aug 17, 2026

* WHAT...Heat index values up to 107 and temperatures up to 105.

* WHERE...Most of North Texas.

* WHEN...Until 8 PM CDT this evening.

* 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.

Take extra precautions when outside by staying hydrated, wearing
lightweight and loose fitting clothing, and limiting strenuous
activities to the early morning or evening. Check up on relatives and
neighbors. Never leave young children or pets in an enclosed vehicle,
even for a short time, as temperatures can quickly rise to
life-threatening levels.

Know the signs and symptoms of heat exhaustion and heat stroke. To
reduce risk when outdoors, 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 ASAP if you or someone you know is exhibiting signs of heat
stroke.

County: Hood
Issued: 12:57 AM - Mon, Aug 17, 2026
Begins: 12:57 AM - Mon, Aug 17, 2026
Expires: 1:00 PM - Mon, Aug 17, 2026

* WHAT...Heat index values up to 107 and temperatures up to 105.

* WHERE...Most of North Texas.

* WHEN...Until 8 PM CDT this evening.

* 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.

Take extra precautions when outside by staying hydrated, wearing
lightweight and loose fitting clothing, and limiting strenuous
activities to the early morning or evening. Check up on relatives and
neighbors. Never leave young children or pets in an enclosed vehicle,
even for a short time, as temperatures can quickly rise to
life-threatening levels.

Know the signs and symptoms of heat exhaustion and heat stroke. To
reduce risk when outdoors, 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 ASAP if you or someone you know is exhibiting signs of heat
stroke.

County: Johnson
Issued: 12:57 AM - Mon, Aug 17, 2026
Begins: 12:57 AM - Mon, Aug 17, 2026
Expires: 1:00 PM - Mon, Aug 17, 2026

* WHAT...Heat index values up to 107 and temperatures up to 105.

* WHERE...Most of North Texas.

* WHEN...Until 8 PM CDT this evening.

* 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.

Take extra precautions when outside by staying hydrated, wearing
lightweight and loose fitting clothing, and limiting strenuous
activities to the early morning or evening. Check up on relatives and
neighbors. Never leave young children or pets in an enclosed vehicle,
even for a short time, as temperatures can quickly rise to
life-threatening levels.

Know the signs and symptoms of heat exhaustion and heat stroke. To
reduce risk when outdoors, 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 ASAP if you or someone you know is exhibiting signs of heat
stroke.

County: Kaufman
Issued: 12:57 AM - Mon, Aug 17, 2026
Begins: 12:57 AM - Mon, Aug 17, 2026
Expires: 1:00 PM - Mon, Aug 17, 2026

* WHAT...Heat index values up to 107 and temperatures up to 105.

* WHERE...Most of North Texas.

* WHEN...Until 8 PM CDT this evening.

* 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.

Take extra precautions when outside by staying hydrated, wearing
lightweight and loose fitting clothing, and limiting strenuous
activities to the early morning or evening. Check up on relatives and
neighbors. Never leave young children or pets in an enclosed vehicle,
even for a short time, as temperatures can quickly rise to
life-threatening levels.

Know the signs and symptoms of heat exhaustion and heat stroke. To
reduce risk when outdoors, 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 ASAP if you or someone you know is exhibiting signs of heat
stroke.

County: Parker
Issued: 12:57 AM - Mon, Aug 17, 2026
Begins: 12:57 AM - Mon, Aug 17, 2026
Expires: 1:00 PM - Mon, Aug 17, 2026

* WHAT...Heat index values up to 107 and temperatures up to 105.

* WHERE...Most of North Texas.

* WHEN...Until 8 PM CDT this evening.

* 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.

Take extra precautions when outside by staying hydrated, wearing
lightweight and loose fitting clothing, and limiting strenuous
activities to the early morning or evening. Check up on relatives and
neighbors. Never leave young children or pets in an enclosed vehicle,
even for a short time, as temperatures can quickly rise to
life-threatening levels.

Know the signs and symptoms of heat exhaustion and heat stroke. To
reduce risk when outdoors, 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 ASAP if you or someone you know is exhibiting signs of heat
stroke.

County: Rockwall
Issued: 12:57 AM - Mon, Aug 17, 2026
Begins: 12:57 AM - Mon, Aug 17, 2026
Expires: 1:00 PM - Mon, Aug 17, 2026

* WHAT...Heat index values up to 107 and temperatures up to 105.

* WHERE...Most of North Texas.

* WHEN...Until 8 PM CDT this evening.

* 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.

Take extra precautions when outside by staying hydrated, wearing
lightweight and loose fitting clothing, and limiting strenuous
activities to the early morning or evening. Check up on relatives and
neighbors. Never leave young children or pets in an enclosed vehicle,
even for a short time, as temperatures can quickly rise to
life-threatening levels.

Know the signs and symptoms of heat exhaustion and heat stroke. To
reduce risk when outdoors, 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 ASAP if you or someone you know is exhibiting signs of heat
stroke.

County: Tarrant
Issued: 12:57 AM - Mon, Aug 17, 2026
Begins: 12:57 AM - Mon, Aug 17, 2026
Expires: 1:00 PM - Mon, Aug 17, 2026

* WHAT...Heat index values up to 107 and temperatures up to 105.

* WHERE...Most of North Texas.

* WHEN...Until 8 PM CDT this evening.

* 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.

Take extra precautions when outside by staying hydrated, wearing
lightweight and loose fitting clothing, and limiting strenuous
activities to the early morning or evening. Check up on relatives and
neighbors. Never leave young children or pets in an enclosed vehicle,
even for a short time, as temperatures can quickly rise to
life-threatening levels.

Know the signs and symptoms of heat exhaustion and heat stroke. To
reduce risk when outdoors, 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 ASAP if you or someone you know is exhibiting signs of heat
stroke.

County: Wise
Issued: 12:57 AM - Mon, Aug 17, 2026
Begins: 12:57 AM - Mon, Aug 17, 2026
Expires: 1:00 PM - Mon, Aug 17, 2026

* WHAT...Heat index values up to 107 and temperatures up to 105.

* WHERE...Most of North Texas.

* WHEN...Until 8 PM CDT this evening.

* 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.

Take extra precautions when outside by staying hydrated, wearing
lightweight and loose fitting clothing, and limiting strenuous
activities to the early morning or evening. Check up on relatives and
neighbors. Never leave young children or pets in an enclosed vehicle,
even for a short time, as temperatures can quickly rise to
life-threatening levels.

Know the signs and symptoms of heat exhaustion and heat stroke. To
reduce risk when outdoors, 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 ASAP if you or someone you know is exhibiting signs of heat
stroke.