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: 4 days

Time span: January 17 2010 to January 20 2010

Statistics over entire affected area:

• Mean temperature anomaly: 9.7 °C
• Mean temperature: -16.8 °C
• Maximum temperature anomaly: 16.7 °C
• Maximum temperature: -11.8 °C

Event center: 65.5°N 284.0°E

Area affected: 96307 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_2010-Jan-17_to_2010-Jan-20_284.0_65.5

Download data: JSON

Event type: Heat wave

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

• Canada

Duration: 5 days

Time span: August 18 2026 to August 22 2026

Statistics over entire affected area:

• Mean temperature anomaly: 5.7 °C
• Mean temperature: 20.0 °C
• Maximum temperature anomaly: 9.0 °C
• Maximum temperature: 25.3 °C

Event center: 50.0°N 240.5°E

Area affected: 74333 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-Aug-18_to_2026-Aug-22_240.5_50.0

Download data: JSON

Event type: Heat wave

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

• Canada

Duration: 9 days

Time span: August 04 2026 to August 12 2026

Statistics over entire affected area:

• Mean temperature anomaly: 1.4 °C
• Mean temperature: 2.2 °C
• Maximum temperature anomaly: 11.2 °C
• Maximum temperature: 15.3 °C

Event center: 78.5°N 249.5°E

Area affected: 531638 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-Aug-04_to_2026-Aug-12_249.5_78.5

Download data: JSON

Event type: Heat wave

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

• Canada

Duration: 9 days

Time span: July 23 2026 to July 31 2026

Statistics over entire affected area:

• Mean temperature anomaly: 5.1 °C
• Mean temperature: 10.4 °C
• Maximum temperature anomaly: 12.3 °C
• Maximum temperature: 19.1 °C

Event center: 73.0°N 280.0°E

Area affected: 147635 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-Jul-23_to_2026-Jul-31_280.0_73.0

Download data: JSON

Event type: Heat wave

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

• Canada

Duration: 39 days

Time span: July 08 2026 to August 15 2026

Statistics over entire affected area:

• Mean temperature anomaly: 5.6 °C
• Mean temperature: 12.6 °C
• Maximum temperature anomaly: 10.5 °C
• Maximum temperature: 21.2 °C

Event center: 68.5°N 250.0°E

Area affected: 149278 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-Jul-08_to_2026-Aug-15_250.0_68.5

Download data: JSON

Event type: Heat wave

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

• Canada

Duration: 5 days

Time span: July 15 2026 to July 19 2026

Statistics over entire affected area:

• Mean temperature anomaly: 1.7 °C
• Mean temperature: 2.9 °C
• Maximum temperature anomaly: 5.8 °C
• Maximum temperature: 9.9 °C

Event center: 74.5°N 230.5°E

Area affected: 103958 km$^2$

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

Event ID: Heat_wave_2026-Jul-15_to_2026-Jul-19_230.5_74.5