Category: Heat waves affecting Brazil

Download data: JSON

Event type: Heat wave

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

• Brazil

Duration: 8 days

Time span: October 22 2025 to October 29 2025

Statistics over entire affected area:

• Mean temperature anomaly: 1.2 °C
• Mean temperature: 30.2 °C
• Maximum temperature anomaly: 2.0 °C
• Maximum temperature: 33.0 °C

Event center: -3.5°S 318.0°E

Area affected: 98742 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-Oct-22_to_2025-Oct-29_318.0_-3.5

Download data: JSON

Event type: Heat wave

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

• Brazil

Duration: 15 days

Time span: October 22 2025 to November 05 2025

Statistics over entire affected area:

• Mean temperature anomaly: 2.5 °C
• Mean temperature: 29.0 °C
• Maximum temperature anomaly: 6.6 °C
• Maximum temperature: 34.0 °C

Event center: -9.5°S 312.5°E

Area affected: 1700729 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-Oct-22_to_2025-Nov-05_312.5_-9.5

Download data: JSON

Event type: Heat wave

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

• Brazil

Duration: 9 days

Time span: October 11 2025 to October 19 2025

Statistics over entire affected area:

• Mean temperature anomaly: 2.0 °C
• Mean temperature: 29.9 °C
• Maximum temperature anomaly: 3.8 °C
• Maximum temperature: 32.3 °C

Event center: -11.5°S 317.0°E

Area affected: 121467 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-Oct-11_to_2025-Oct-19_317.0_-11.5

Download data: JSON

Event type: Heat wave

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

• Brazil

Duration: 13 days

Time span: September 27 2025 to October 09 2025

Statistics over entire affected area:

• Mean temperature anomaly: 2.8 °C
• Mean temperature: 29.6 °C
• Maximum temperature anomaly: 5.5 °C
• Maximum temperature: 32.9 °C

Event center: -12.0°S 305.5°E

Area affected: 845233 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-27_to_2025-Oct-09_305.5_-12.0

Download data: JSON

Event type: Heat wave

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

• Brazil

Duration: 4 days

Time span: September 21 2025 to September 24 2025

Statistics over entire affected area:

• Mean temperature anomaly: 2.4 °C
• Mean temperature: 29.8 °C
• Maximum temperature anomaly: 3.9 °C
• Maximum temperature: 32.0 °C

Event center: -11.5°S 315.5°E

Area affected: 81686 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-21_to_2025-Sep-24_315.5_-11.5

Download data: JSON

Event type: Heat wave

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

• Brazil

Duration: 4 days

Time span: September 21 2025 to September 24 2025

Statistics over entire affected area:

• Mean temperature anomaly: 1.2 °C
• Mean temperature: 24.6 °C
• Maximum temperature anomaly: 1.6 °C
• Maximum temperature: 25.2 °C

Event center: -18.5°S 320.5°E

Area affected: 81432 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-21_to_2025-Sep-24_320.5_-18.5