Category: Heat waves affecting South Africa

Heat wave occuring from June 12 2023 to June 21 2023 at -23.5°S 30.0°E

Download data: JSON

Event type: Heat wave

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

  • Mozambique
  • South Africa
  • Zimbabwe

Duration: 10 days

Time span: June 12 2023 to June 21 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 2.8 °C
  • Mean temperature: 17.8 °C
  • Maximum temperature anomaly: 5.1 °C
  • Maximum temperature: 21.5 °C

Event center: -23.5°S 30.0°E

Area affected: 76418 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-12_to_2023-Jun-21_30.0_-23.5

Heat wave occuring from April 17 2023 to April 20 2023 at -34.5°S 34.0°E

Download data: JSON

Event type: Heat wave

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

  • South Africa

Duration: 4 days

Time span: April 17 2023 to April 20 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 2.5 °C
  • Mean temperature: 23.5 °C
  • Maximum temperature anomaly: 4.4 °C
  • Maximum temperature: 25.6 °C

Event center: -34.5°S 34.0°E

Area affected: 200342 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-Apr-17_to_2023-Apr-20_34.0_-34.5

Heat wave occuring from April 15 2023 to April 19 2023 at -26.5°S 15.0°E

Download data: JSON

Event type: Heat wave

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

  • Namibia
  • South Africa

Duration: 5 days

Time span: April 15 2023 to April 19 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 4.9 °C
  • Mean temperature: 25.1 °C
  • Maximum temperature anomaly: 9.6 °C
  • Maximum temperature: 29.0 °C

Event center: -26.5°S 15.0°E

Area affected: 118797 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-Apr-15_to_2023-Apr-19_15.0_-26.5

Heat wave occuring from April 01 2023 to May 14 2023 at -18.5°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
  • Mozambique
  • Namibia
  • South Africa
  • Zambia
  • Zimbabwe

Duration: 44 days

Time span: April 01 2023 to May 14 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 3.1 °C
  • Mean temperature: 24.0 °C
  • Maximum temperature anomaly: 7.3 °C
  • Maximum temperature: 31.4 °C

Event center: -18.5°S 14.5°E

Area affected: 2862259 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-Apr-01_to_2023-May-14_14.5_-18.5

Heat wave occuring from March 18 2023 to March 22 2023 at -33.5°S 34.0°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: March 18 2023 to March 22 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 2.2 °C
  • Mean temperature: 25.5 °C
  • Maximum temperature anomaly: 4.7 °C
  • Maximum temperature: 27.1 °C

Event center: -33.5°S 34.0°E

Area affected: 262691 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-Mar-18_to_2023-Mar-22_34.0_-33.5

Heat wave occuring from February 23 2023 to February 28 2023 at -26.0°S 16.5°E

Download data: JSON

Event type: Heat wave

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

  • Botswana
  • Namibia
  • South Africa

Duration: 6 days

Time span: February 23 2023 to February 28 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 3.8 °C
  • Mean temperature: 29.5 °C
  • Maximum temperature anomaly: 5.1 °C
  • Maximum temperature: 32.4 °C

Event center: -26.0°S 16.5°E

Area affected: 153220 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-Feb-23_to_2023-Feb-28_16.5_-26.0

Heat wave occuring from February 04 2023 to February 14 2023 at -32.0°S 7.0°E

Download data: JSON

Event type: Heat wave

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

  • South Africa

Duration: 11 days

Time span: February 04 2023 to February 14 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 1.9 °C
  • Mean temperature: 24.5 °C
  • Maximum temperature anomaly: 3.2 °C
  • Maximum temperature: 26.7 °C

Event center: -30.0°S 338.5°E

Area affected: 2545050 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-Feb-04_to_2023-Feb-14_7.0_-32.0

Heat wave occuring from February 02 2023 to February 16 2023 at -34.5°S 37.5°E

Download data: JSON

Event type: Heat wave

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

  • South Africa

Duration: 15 days

Time span: February 02 2023 to February 16 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 2.4 °C
  • Mean temperature: 23.8 °C
  • Maximum temperature anomaly: 6.0 °C
  • Maximum temperature: 27.4 °C

Event center: -34.5°S 37.5°E

Area affected: 1695904 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-Feb-02_to_2023-Feb-16_37.5_-34.5

Heat wave occuring from January 15 2023 to January 21 2023 at -35.0°S 21.5°E

Download data: JSON

Event type: Heat wave

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

  • South Africa

Duration: 7 days

Time span: January 15 2023 to January 21 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 1.9 °C
  • Mean temperature: 22.2 °C
  • Maximum temperature anomaly: 3.0 °C
  • Maximum temperature: 24.3 °C

Event center: -35.0°S 21.5°E

Area affected: 70646 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-Jan-15_to_2023-Jan-21_21.5_-35.0

Heat wave occuring from January 06 2023 to February 02 2023 at -44.5°S 30.0°E

Download data: JSON

Event type: Heat wave

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

  • Botswana
  • Eswatini
  • French Southern Territories
  • Lesotho
  • Madagascar
  • Mozambique
  • Namibia
  • South Africa

Duration: 28 days

Time span: January 06 2023 to February 02 2023

Statistics over entire affected area:

  • Mean temperature anomaly: 3.0 °C
  • Mean temperature: 17.9 °C
  • Maximum temperature anomaly: 9.8 °C
  • Maximum temperature: 36.1 °C

Event center: -44.5°S 30.0°E

Area affected: 13158331 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-Jan-06_to_2023-Feb-02_30.0_-44.5