Category: Heat waves affecting United States

Heat wave occuring from November 22 2025 to November 24 2025 at 49.0°N 262.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 3 days

Time span: November 22 2025 to November 24 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 8.1 °C
  • Mean temperature: 3.2 °C
  • Maximum temperature anomaly: 11.2 °C
  • Maximum temperature: 7.1 °C

Event center: 49.0°N 262.0°E

Area affected: 208931 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-22_to_2025-Nov-24_262.0_49.0

Heat wave occuring from November 20 2025 to November 23 2025 at 66.0°N 215.0°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 4 days

Time span: November 20 2025 to November 23 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 12.4 °C
  • Mean temperature: -7.8 °C
  • Maximum temperature anomaly: 17.8 °C
  • Maximum temperature: -3.9 °C

Event center: 66.0°N 215.0°E

Area affected: 57091 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-20_to_2025-Nov-23_215.0_66.0

Heat wave occuring from November 20 2025 to November 24 2025 at 50.5°N 242.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 5 days

Time span: November 20 2025 to November 24 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 6.2 °C
  • Mean temperature: 1.8 °C
  • Maximum temperature anomaly: 8.1 °C
  • Maximum temperature: 5.7 °C

Event center: 50.5°N 242.0°E

Area affected: 95936 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-20_to_2025-Nov-24_242.0_50.5

Heat wave occuring from November 04 2025 to November 08 2025 at 31.0°N 256.0°E

Download data: JSON

Event type: Heat wave

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

  • Mexico
  • United States

Duration: 5 days

Time span: November 04 2025 to November 08 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 5.3 °C
  • Mean temperature: 20.4 °C
  • Maximum temperature anomaly: 8.1 °C
  • Maximum temperature: 23.7 °C

Event center: 31.0°N 256.0°E

Area affected: 101711 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-04_to_2025-Nov-08_256.0_31.0

Heat wave occuring from November 02 2025 to November 06 2025 at 39.0°N 253.5°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 02 2025 to November 06 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 6.6 °C
  • Mean temperature: 4.8 °C
  • Maximum temperature anomaly: 8.8 °C
  • Maximum temperature: 11.3 °C

Event center: 39.0°N 253.5°E

Area affected: 87967 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-02_to_2025-Nov-06_253.5_39.0

Heat wave occuring from October 31 2025 to November 06 2025 at 39.0°N 248.5°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 7 days

Time span: October 31 2025 to November 06 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 6.2 °C
  • Mean temperature: 11.9 °C
  • Maximum temperature anomaly: 9.7 °C
  • Maximum temperature: 22.1 °C

Event center: 39.0°N 248.5°E

Area affected: 313611 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-Oct-31_to_2025-Nov-06_248.5_39.0

Heat wave occuring from October 31 2025 to November 09 2025 at 32.0°N 250.5°E

Download data: JSON

Event type: Heat wave

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

  • Mexico
  • United States

Duration: 10 days

Time span: October 31 2025 to November 09 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 5.0 °C
  • Mean temperature: 13.5 °C
  • Maximum temperature anomaly: 7.5 °C
  • Maximum temperature: 19.5 °C

Event center: 32.0°N 250.5°E

Area affected: 124967 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-Oct-31_to_2025-Nov-09_250.5_32.0

Heat wave occuring from October 16 2025 to October 31 2025 at 15.5°N 280.0°E

Download data: JSON

Event type: Heat wave

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

  • Colombia
  • Cuba
  • Jamaica
  • Mexico
  • United States

Duration: 16 days

Time span: October 16 2025 to October 31 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.0 °C
  • Mean temperature: 28.0 °C
  • Maximum temperature anomaly: 6.5 °C
  • Maximum temperature: 30.4 °C

Event center: 15.5°N 280.0°E

Area affected: 1861646 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-Oct-16_to_2025-Oct-31_280.0_15.5

Heat wave occuring from October 16 2025 to October 19 2025 at 34.0°N 272.5°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 4 days

Time span: October 16 2025 to October 19 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 5.4 °C
  • Mean temperature: 22.7 °C
  • Maximum temperature anomaly: 7.1 °C
  • Maximum temperature: 25.2 °C

Event center: 34.0°N 272.5°E

Area affected: 92959 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-Oct-16_to_2025-Oct-19_272.5_34.0

Heat wave occuring from October 12 2025 to October 18 2025 at 64.5°N 212.0°E

Download data: JSON

Event type: Heat wave

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

  • United States

Duration: 7 days

Time span: October 12 2025 to October 18 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 6.3 °C
  • Mean temperature: 2.8 °C
  • Maximum temperature anomaly: 10.1 °C
  • Maximum temperature: 7.6 °C

Event center: 64.5°N 212.0°E

Area affected: 104328 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-Oct-12_to_2025-Oct-18_212.0_64.5