Category: Heat waves affecting Canada

Download data: JSON

Event type: Heat wave

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

• Canada
• United States

Duration: 9 days

Time span: April 25 2026 to May 03 2026

Statistics over entire affected area:

• Mean temperature anomaly: 5.4 °C
• Mean temperature: 5.2 °C
• Maximum temperature anomaly: 10.0 °C
• Maximum temperature: 15.9 °C

Event center: 48.5°N 291.0°E

Area affected: 1017992 km$^2$

Fig. 1: unavailable since event is ongoing.

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

Event ID: Heat_wave_2026-Apr-25_to_2026-May-03_291.0_48.5

Download data: JSON

Event type: Heat wave

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

• Canada
• United States

Duration: 15 days

Time span: April 19 2026 to May 03 2026

Statistics over entire affected area:

• Mean temperature anomaly: 7.1 °C
• Mean temperature: 14.4 °C
• Maximum temperature anomaly: 14.6 °C
• Maximum temperature: 24.5 °C

Event center: 49.5°N 234.0°E

Area affected: 1910635 km$^2$

Fig. 1: unavailable since event is ongoing.

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

Event ID: Heat_wave_2026-Apr-19_to_2026-May-03_234.0_49.5

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: April 09 2026 to April 13 2026

Statistics over entire affected area:

• Mean temperature anomaly: 4.6 °C
• Mean temperature: 7.5 °C
• Maximum temperature anomaly: 7.0 °C
• Maximum temperature: 11.6 °C

Event center: 50.5°N 238.5°E

Area affected: 110848 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-Apr-09_to_2026-Apr-13_238.5_50.5

Download data: JSON

Event type: Heat wave

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

• Canada
• United States

Duration: 4 days

Time span: April 04 2026 to April 07 2026

Statistics over entire affected area:

• Mean temperature anomaly: 5.8 °C
• Mean temperature: 8.4 °C
• Maximum temperature anomaly: 9.0 °C
• Maximum temperature: 14.3 °C

Event center: 49.5°N 241.5°E

Area affected: 120426 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-Apr-04_to_2026-Apr-07_241.5_49.5

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