Category: Heat waves affecting Canada

Download data: JSON

Event type: Heat wave

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

• Canada

Duration: 3 days

Time span: November 10 2025 to November 12 2025

Statistics over entire affected area:

• Mean temperature anomaly: 7.7 °C
• Mean temperature: 1.5 °C
• Maximum temperature anomaly: 9.6 °C
• Maximum temperature: 4.1 °C

Event center: 57.0°N 247.0°E

Area affected: 67559 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-10_to_2025-Nov-12_247.0_57.0

Download data: JSON

Event type: Heat wave

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

• Canada

Duration: 3 days

Time span: November 05 2025 to November 07 2025

Statistics over entire affected area:

• Mean temperature anomaly: 7.9 °C
• Mean temperature: -13.0 °C
• Maximum temperature anomaly: 12.9 °C
• Maximum temperature: -8.0 °C

Event center: 87.0°N 279.5°E

Area affected: 60052 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-05_to_2025-Nov-07_279.5_87.0

Download data: JSON

Event type: Heat wave

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

• Canada

Duration: 4 days

Time span: October 23 2025 to October 26 2025

Statistics over entire affected area:

• Mean temperature anomaly: 6.6 °C
• Mean temperature: 8.5 °C
• Maximum temperature anomaly: 10.4 °C
• Maximum temperature: 13.9 °C

Event center: 52.0°N 246.0°E

Area affected: 74452 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-23_to_2025-Oct-26_246.0_52.0

Download data: JSON

Event type: Heat wave

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

• Canada

Duration: 7 days

Time span: October 21 2025 to October 27 2025

Statistics over entire affected area:

• Mean temperature anomaly: 6.2 °C
• Mean temperature: 1.1 °C
• Maximum temperature anomaly: 8.9 °C
• Maximum temperature: 5.4 °C

Event center: 62.0°N 233.5°E

Area affected: 89165 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-21_to_2025-Oct-27_233.5_62.0

Download data: JSON

Event type: Heat wave

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

• Canada

Duration: 3 days

Time span: October 07 2025 to October 09 2025

Statistics over entire affected area:

• Mean temperature anomaly: 4.2 °C
• Mean temperature: 15.4 °C
• Maximum temperature anomaly: 7.7 °C
• Maximum temperature: 22.0 °C

Event center: 46.0°N 304.5°E

Area affected: 283100 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-07_to_2025-Oct-09_304.5_46.0

Download data: JSON

Event type: Heat wave

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

• Canada

Duration: 4 days

Time span: October 05 2025 to October 08 2025

Statistics over entire affected area:

• Mean temperature anomaly: 2.5 °C
• Mean temperature: 3.9 °C
• Maximum temperature anomaly: 6.7 °C
• Maximum temperature: 9.2 °C

Event center: 58.5°N 298.5°E

Area affected: 76073 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-05_to_2025-Oct-08_298.5_58.5

Download data: JSON

Event type: Heat wave

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

• Canada

Duration: 4 days

Time span: September 24 2025 to September 27 2025

Statistics over entire affected area:

• Mean temperature anomaly: 5.0 °C
• Mean temperature: -3.6 °C
• Maximum temperature anomaly: 5.9 °C
• Maximum temperature: -2.4 °C

Event center: 89.0°N 325.5°E

Area affected: 61817 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-Sep-24_to_2025-Sep-27_325.5_89.0