Category: Heat waves affecting United States

Heat wave occuring from March 03 2026 to March 10 2026 at 44.5°N 270.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Canada
  • United States

Duration: 8 days

Time span: March 03 2026 to March 10 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 8.7 °C
  • Mean temperature: 4.1 °C
  • Maximum temperature anomaly: 15.4 °C
  • Maximum temperature: 13.7 °C

Event center: 44.5°N 270.5°E

Area affected: 391824 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Mar-03_to_2026-Mar-10_270.5_44.5

Heat wave occuring from January 08 2026 to January 26 2026 at 62.0°N 216.0°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Canada
  • United States

Duration: 19 days

Time span: January 08 2026 to January 26 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 9.5 °C
  • Mean temperature: 5.1 °C
  • Maximum temperature anomaly: 23.1 °C
  • Maximum temperature: 23.0 °C

Event center: 62.0°N 216.0°E

Area affected: 6054362 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Jan-08_to_2026-Jan-26_216.0_62.0

Heat wave occuring from February 25 2026 to March 04 2026 at 49.0°N 240.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Canada
  • United States

Duration: 8 days

Time span: February 25 2026 to March 04 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 6.5 °C
  • Mean temperature: 4.3 °C
  • Maximum temperature anomaly: 9.1 °C
  • Maximum temperature: 7.0 °C

Event center: 49.0°N 240.5°E

Area affected: 64825 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Feb-25_to_2026-Mar-04_240.5_49.0

Heat wave occuring from February 12 2026 to February 19 2026 at 44.5°N 190.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • United States

Duration: 8 days

Time span: February 12 2026 to February 19 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 3.3 °C
  • Mean temperature: 8.4 °C
  • Maximum temperature anomaly: 8.1 °C
  • Maximum temperature: 17.2 °C

Event center: 44.5°N 190.5°E

Area affected: 3966795 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Feb-12_to_2026-Feb-19_190.5_44.5

Heat wave occuring from February 10 2026 to February 20 2026 at 24.0°N 197.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • United States

Duration: 11 days

Time span: February 10 2026 to February 20 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 1.6 °C
  • Mean temperature: 23.2 °C
  • Maximum temperature anomaly: 2.5 °C
  • Maximum temperature: 25.2 °C

Event center: 24.0°N 197.5°E

Area affected: 396896 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Feb-10_to_2026-Feb-20_197.5_24.0

Heat wave occuring from February 09 2026 to February 11 2026 at 33.5°N 266.0°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • United States

Duration: 3 days

Time span: February 09 2026 to February 11 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 8.8 °C
  • Mean temperature: 18.2 °C
  • Maximum temperature anomaly: 12.3 °C
  • Maximum temperature: 20.7 °C

Event center: 33.5°N 266.0°E

Area affected: 122448 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Feb-09_to_2026-Feb-11_266.0_33.5

Heat wave occuring from January 08 2026 to February 05 2026 at 58.0°N 142.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Canada
  • Russian Federation
  • Svalbard and Jan Mayen
  • United States

Duration: 29 days

Time span: January 08 2026 to February 05 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 11.4 °C
  • Mean temperature: -10.1 °C
  • Maximum temperature anomaly: 32.3 °C
  • Maximum temperature: 17.2 °C

Event center: 58.0°N 142.5°E

Area affected: 11950817 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2026-Jan-08_to_2026-Feb-05_142.5_58.0

Heat wave occuring from December 28 2025 to January 03 2026 at 55.0°N 234.0°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Canada
  • United States

Duration: 7 days

Time span: December 28 2025 to January 03 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 7.2 °C
  • Mean temperature: 4.0 °C
  • Maximum temperature anomaly: 15.6 °C
  • Maximum temperature: 10.3 °C

Event center: 55.0°N 234.0°E

Area affected: 429433 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2025-Dec-28_to_2026-Jan-03_234.0_55.0

Heat wave occuring from November 26 2025 to January 09 2026 at 43.5°N 172.5°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • Russian Federation
  • United States

Duration: 45 days

Time span: November 26 2025 to January 09 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 6.9 °C
  • Mean temperature: 2.7 °C
  • Maximum temperature anomaly: 34.5 °C
  • Maximum temperature: 26.0 °C

Event center: 43.5°N 172.5°E

Area affected: 12313111 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2025-Nov-26_to_2026-Jan-09_172.5_43.5

Heat wave occuring from November 25 2025 to November 29 2025 at 35.0°N 239.0°E

Download data: JSON

Event type: Heat wave

Countries affected (identified with ArcGIS Online; provided only for geographical reference):

  • United States

Duration: 5 days

Time span: November 25 2025 to November 29 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.1 °C
  • Mean temperature: 17.3 °C
  • Maximum temperature anomaly: 4.6 °C
  • Maximum temperature: 18.7 °C

Event center: 35.0°N 239.0°E

Area affected: 132868 km$^2$


Fig. 1: Map of most extreme temperature anomalies (standardized) experienced during the event. The purple star indicates the center of the extreme event. Green hatching illustrates all areas under the effect of extremes at some time during the event.



Fig. 2: Evolution of temperature at the center of the event. The climatological percentile distribution is illustrated with color shadings.



Fig. 3: Maps illustrating the evolution of standardized temperature anomalies during the event.

Event ID: Heat_wave_2025-Nov-25_to_2025-Nov-29_239.0_35.0