Category: Heat waves affecting South Africa

Heat wave occuring from October 10 2023 to October 27 2023 at -36.5°S 13.0°E

Download data: JSON

Event type: Heat wave

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

  • South Africa

Duration: 18 days

Time span: October 10 2023 to October 27 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 2.1 °C
  • Mean temperature: 16.9 °C
  • Maximum temperature anomaly: 7.3 °C
  • Maximum temperature: 26.3 °C

Event center: -36.5°S 13.0°E

Area affected: 1842016 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_2023-Oct-10_to_2023-Oct-27_13.0_-36.5

Heat wave occuring from September 16 2023 to September 26 2023 at -18.5°S 25.0°E

Download data: JSON

Event type: Heat wave

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

  • Angola
  • Botswana
  • Mozambique
  • Namibia
  • South Africa
  • Zambia
  • Zimbabwe

Duration: 11 days

Time span: September 16 2023 to September 26 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 3.5 °C
  • Mean temperature: 27.9 °C
  • Maximum temperature anomaly: 6.4 °C
  • Maximum temperature: 30.7 °C

Event center: -18.5°S 25.0°E

Area affected: 618003 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_2023-Sep-16_to_2023-Sep-26_25.0_-18.5

Heat wave occuring from September 01 2023 to September 11 2023 at -23.0°S 26.5°E

Download data: JSON

Event type: Heat wave

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

  • Botswana
  • Lesotho
  • Namibia
  • South Africa
  • Zambia
  • Zimbabwe

Duration: 11 days

Time span: September 01 2023 to September 11 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 4.0 °C
  • Mean temperature: 23.5 °C
  • Maximum temperature anomaly: 6.7 °C
  • Maximum temperature: 27.8 °C

Event center: -23.0°S 26.5°E

Area affected: 778976 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_2023-Sep-01_to_2023-Sep-11_26.5_-23.0

Heat wave occuring from August 27 2023 to August 30 2023 at -28.5°S 16.5°E

Download data: JSON

Event type: Heat wave

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

  • Namibia
  • South Africa

Duration: 4 days

Time span: August 27 2023 to August 30 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 5.8 °C
  • Mean temperature: 20.5 °C
  • Maximum temperature anomaly: 12.4 °C
  • Maximum temperature: 29.1 °C

Event center: -28.5°S 16.5°E

Area affected: 201225 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_2023-Aug-27_to_2023-Aug-30_16.5_-28.5

Heat wave occuring from August 27 2023 to August 31 2023 at -39.0°S 25.5°E

Download data: JSON

Event type: Heat wave

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

  • South Africa

Duration: 5 days

Time span: August 27 2023 to August 31 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 3.6 °C
  • Mean temperature: 17.2 °C
  • Maximum temperature anomaly: 9.8 °C
  • Maximum temperature: 24.8 °C

Event center: -39.0°S 25.5°E

Area affected: 729705 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_2023-Aug-27_to_2023-Aug-31_25.5_-39.0

Heat wave occuring from August 13 2023 to August 17 2023 at -26.5°S 25.0°E

Download data: JSON

Event type: Heat wave

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

  • Botswana
  • South Africa

Duration: 5 days

Time span: August 13 2023 to August 17 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 4.1 °C
  • Mean temperature: 19.9 °C
  • Maximum temperature anomaly: 5.6 °C
  • Maximum temperature: 22.4 °C

Event center: -26.5°S 25.0°E

Area affected: 70537 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_2023-Aug-13_to_2023-Aug-17_25.0_-26.5

Heat wave occuring from August 03 2023 to August 13 2023 at -30.5°S 21.0°E

Download data: JSON

Event type: Heat wave

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

  • Namibia
  • South Africa

Duration: 11 days

Time span: August 03 2023 to August 13 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 5.3 °C
  • Mean temperature: 18.3 °C
  • Maximum temperature anomaly: 9.0 °C
  • Maximum temperature: 23.8 °C

Event center: -30.5°S 21.0°E

Area affected: 362596 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_2023-Aug-03_to_2023-Aug-13_21.0_-30.5

Heat wave occuring from August 01 2023 to August 12 2023 at -41.0°S 23.0°E

Download data: JSON

Event type: Heat wave

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

  • South Africa

Duration: 12 days

Time span: August 01 2023 to August 12 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 3.6 °C
  • Mean temperature: 18.1 °C
  • Maximum temperature anomaly: 7.6 °C
  • Maximum temperature: 22.2 °C

Event center: -41.0°S 23.0°E

Area affected: 610234 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_2023-Aug-01_to_2023-Aug-12_23.0_-41.0

Heat wave occuring from July 20 2023 to August 08 2023 at -13.0°S 14.5°E

Download data: JSON

Event type: Heat wave

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

  • Angola
  • Botswana
  • Eswatini
  • Lesotho
  • Namibia
  • South Africa

Duration: 20 days

Time span: July 20 2023 to August 08 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 3.8 °C
  • Mean temperature: 19.2 °C
  • Maximum temperature anomaly: 9.0 °C
  • Maximum temperature: 25.1 °C

Event center: -13.0°S 14.5°E

Area affected: 1340695 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_2023-Jul-20_to_2023-Aug-08_14.5_-13.0

Heat wave occuring from June 21 2023 to June 27 2023 at -28.5°S 24.0°E

Download data: JSON

Event type: Heat wave

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

  • Botswana
  • Lesotho
  • Namibia
  • South Africa

Duration: 7 days

Time span: June 21 2023 to June 27 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 4.4 °C
  • Mean temperature: 16.3 °C
  • Maximum temperature anomaly: 8.1 °C
  • Maximum temperature: 20.3 °C

Event center: -28.5°S 24.0°E

Area affected: 533762 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_2023-Jun-21_to_2023-Jun-27_24.0_-28.5