Category: Extremes affecting Canada

Heat wave occuring from January 06 2010 to January 23 2010 at 48.5°N 238.0°E

Download data: JSON

Event type: Heat wave

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

  • Canada
  • United States

Duration: 18 days

Time span: January 06 2010 to January 23 2010

Statistics over entire affected area:

  • Mean temperature anomaly: 8.7 °C
  • Mean temperature: 2.1 °C
  • Maximum temperature anomaly: 18.6 °C
  • Maximum temperature: 11.9 °C

Event center: 48.5°N 238.0°E

Area affected: 1466747 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-06_to_2010-Jan-23_238.0_48.5

Heat wave occuring from August 18 2026 to August 22 2026 at 50.0°N 240.5°E

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

Cold spell occuring from August 07 2026 to August 20 2026 at 65.0°N 296.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 14 days

Time span: August 07 2026 to August 20 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -3.0 °C
  • Mean temperature: 1.0 °C
  • Minimum temperature anomaly: -6.8 °C
  • Minimum temperature: -3.3 °C

Event center: 65.0°N 296.5°E

Area affected: 121254 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: Cold_spell_2026-Aug-07_to_2026-Aug-20_296.5_65.0

Heat wave occuring from August 04 2026 to August 12 2026 at 78.5°N 249.5°E

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

Cold spell occuring from July 24 2026 to August 05 2026 at 71.0°N 235.5°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 13 days

Time span: July 24 2026 to August 05 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -3.6 °C
  • Mean temperature: 1.3 °C
  • Minimum temperature anomaly: -5.8 °C
  • Minimum temperature: -0.8 °C

Event center: 71.0°N 235.5°E

Area affected: 52607 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: Cold_spell_2026-Jul-24_to_2026-Aug-05_235.5_71.0

Heat wave occuring from July 23 2026 to July 31 2026 at 73.0°N 280.0°E

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

Heat wave occuring from July 08 2026 to August 15 2026 at 68.5°N 250.0°E

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

Cold spell occuring from July 15 2026 to July 21 2026 at 58.0°N 293.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 7 days

Time span: July 15 2026 to July 21 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -5.6 °C
  • Mean temperature: 7.6 °C
  • Minimum temperature anomaly: -8.5 °C
  • Minimum temperature: 4.1 °C

Event center: 58.0°N 293.0°E

Area affected: 129604 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: Cold_spell_2026-Jul-15_to_2026-Jul-21_293.0_58.0

Heat wave occuring from July 15 2026 to July 19 2026 at 74.5°N 230.5°E

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

Cold spell occuring from July 08 2026 to July 11 2026 at 58.0°N 234.0°E

Download data: JSON

Event type: Cold spell

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

  • Canada

Duration: 4 days

Time span: July 08 2026 to July 11 2026

Statistics over entire affected area:

  • Mean temperature anomaly: -3.8 °C
  • Mean temperature: 8.4 °C
  • Minimum temperature anomaly: -6.6 °C
  • Minimum temperature: 1.5 °C

Event center: 58.0°N 234.0°E

Area affected: 58853 km$^2$



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

Event ID: Cold_spell_2026-Jul-08_to_2026-Jul-11_234.0_58.0