Category: Heat waves affecting Brazil

Heat wave occuring from September 19 2025 to September 21 2025 at -21.5°S 301.0°E

Download data: JSON

Event type: Heat wave

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

  • Bolivia, Plurinational State of
  • Brazil
  • Paraguay

Duration: 3 days

Time span: September 19 2025 to September 21 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 6.1 °C
  • Mean temperature: 32.5 °C
  • Maximum temperature anomaly: 7.8 °C
  • Maximum temperature: 34.0 °C

Event center: -21.5°S 301.0°E

Area affected: 75383 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_2025-Sep-19_to_2025-Sep-21_301.0_-21.5

Heat wave occuring from September 10 2025 to September 15 2025 at -12.5°S 314.5°E

Download data: JSON

Event type: Heat wave

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

  • Brazil

Duration: 6 days

Time span: September 10 2025 to September 15 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.5 °C
  • Mean temperature: 27.6 °C
  • Maximum temperature anomaly: 4.0 °C
  • Maximum temperature: 30.0 °C

Event center: -12.5°S 314.5°E

Area affected: 66177 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_2025-Sep-10_to_2025-Sep-15_314.5_-12.5

Heat wave occuring from September 02 2025 to October 04 2025 at -1.5°S 318.0°E

Download data: JSON

Event type: Heat wave

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

  • Brazil

Duration: 33 days

Time span: September 02 2025 to October 04 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 0.6 °C
  • Mean temperature: 27.0 °C
  • Maximum temperature anomaly: 1.5 °C
  • Maximum temperature: 30.8 °C

Event center: -1.5°S 318.0°E

Area affected: 1688525 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_2025-Sep-02_to_2025-Oct-04_318.0_-1.5

Heat wave occuring from August 29 2025 to September 03 2025 at -32.5°S 307.0°E

Download data: JSON

Event type: Heat wave

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

  • Brazil
  • Uruguay

Duration: 6 days

Time span: August 29 2025 to September 03 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 3.8 °C
  • Mean temperature: 16.2 °C
  • Maximum temperature anomaly: 6.3 °C
  • Maximum temperature: 21.7 °C

Event center: -32.5°S 307.0°E

Area affected: 173393 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_2025-Aug-29_to_2025-Sep-03_307.0_-32.5

Heat wave occuring from August 28 2025 to September 02 2025 at -10.5°S 296.0°E

Download data: JSON

Event type: Heat wave

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

  • Bolivia, Plurinational State of
  • Brazil

Duration: 6 days

Time span: August 28 2025 to September 02 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.5 °C
  • Mean temperature: 28.9 °C
  • Maximum temperature anomaly: 3.9 °C
  • Maximum temperature: 30.2 °C

Event center: -10.5°S 296.0°E

Area affected: 127407 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_2025-Aug-28_to_2025-Sep-02_296.0_-10.5

Heat wave occuring from August 25 2025 to August 30 2025 at -5.0°S 317.5°E

Download data: JSON

Event type: Heat wave

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

  • Brazil

Duration: 6 days

Time span: August 25 2025 to August 30 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.2 °C
  • Mean temperature: 29.6 °C
  • Maximum temperature anomaly: 1.6 °C
  • Maximum temperature: 32.0 °C

Event center: -5.0°S 317.5°E

Area affected: 55403 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_2025-Aug-25_to_2025-Aug-30_317.5_-5.0

Heat wave occuring from August 20 2025 to August 26 2025 at -22.5°S 313.5°E

Download data: JSON

Event type: Heat wave

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

  • Brazil

Duration: 7 days

Time span: August 20 2025 to August 26 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 3.8 °C
  • Mean temperature: 22.6 °C
  • Maximum temperature anomaly: 6.6 °C
  • Maximum temperature: 26.4 °C

Event center: -22.5°S 313.5°E

Area affected: 145589 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_2025-Aug-20_to_2025-Aug-26_313.5_-22.5

Heat wave occuring from August 13 2025 to September 11 2025 at -1.5°S 316.5°E

Download data: JSON

Event type: Heat wave

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

  • Brazil

Duration: 30 days

Time span: August 13 2025 to September 11 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 0.5 °C
  • Mean temperature: 27.3 °C
  • Maximum temperature anomaly: 1.4 °C
  • Maximum temperature: 29.8 °C

Event center: -1.5°S 316.5°E

Area affected: 534276 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_2025-Aug-13_to_2025-Sep-11_316.5_-1.5

Heat wave occuring from August 12 2025 to August 19 2025 at 4.5°N 308.0°E

Download data: JSON

Event type: Heat wave

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

  • Brazil
  • French Guiana

Duration: 8 days

Time span: August 12 2025 to August 19 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 0.8 °C
  • Mean temperature: 27.5 °C
  • Maximum temperature anomaly: 1.5 °C
  • Maximum temperature: 28.0 °C

Event center: 4.5°N 308.0°E

Area affected: 92617 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_2025-Aug-12_to_2025-Aug-19_308.0_4.5

Heat wave occuring from August 07 2025 to September 27 2025 at -8.0°S 307.0°E

Download data: JSON

Event type: Heat wave

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

  • Argentina
  • Bolivia, Plurinational State of
  • Brazil
  • Chile
  • Ecuador
  • Paraguay
  • Peru
  • Uruguay

Duration: 52 days

Time span: August 07 2025 to September 27 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 3.5 °C
  • Mean temperature: 25.1 °C
  • Maximum temperature anomaly: 10.4 °C
  • Maximum temperature: 35.1 °C

Event center: -8.0°S 307.0°E

Area affected: 4616956 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_2025-Aug-07_to_2025-Sep-27_307.0_-8.0