Category: Extremes affecting Brazil

Heat wave occuring from October 31 2025 to November 05 2025 at 2.0°N 307.5°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: October 31 2025 to November 05 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.7 °C
  • Mean temperature: 29.3 °C
  • Maximum temperature anomaly: 2.5 °C
  • Maximum temperature: 30.5 °C

Event center: 2.0°N 307.5°E

Area affected: 95802 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-31_to_2025-Nov-05_307.5_2.0

Cold spell occuring from October 29 2025 to October 31 2025 at -22.5°S 304.0°E

Download data: JSON

Event type: Cold spell

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

  • Brazil
  • Paraguay

Duration: 3 days

Time span: October 29 2025 to October 31 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -6.5 °C
  • Mean temperature: 19.3 °C
  • Minimum temperature anomaly: -9.1 °C
  • Minimum temperature: 16.5 °C

Event center: -22.5°S 304.0°E

Area affected: 54517 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_2025-Oct-29_to_2025-Oct-31_304.0_-22.5

Cold spell occuring from October 26 2025 to November 01 2025 at -18.0°S 297.0°E

Download data: JSON

Event type: Cold spell

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

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

Duration: 7 days

Time span: October 26 2025 to November 01 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -6.4 °C
  • Mean temperature: 14.2 °C
  • Minimum temperature anomaly: -13.6 °C
  • Minimum temperature: -1.0 °C

Event center: -18.0°S 297.0°E

Area affected: 2424586 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_2025-Oct-26_to_2025-Nov-01_297.0_-18.0

Heat wave occuring from October 22 2025 to October 29 2025 at -3.5°S 318.0°E

Download data: JSON

Event type: Heat wave

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

  • Brazil

Duration: 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

Heat wave occuring from October 22 2025 to November 05 2025 at -9.5°S 312.5°E

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

Heat wave occuring from October 19 2025 to October 29 2025 at -49.5°S 315.0°E

Download data: JSON

Event type: Heat wave

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

  • Argentina
  • Brazil
  • Uruguay

Duration: 11 days

Time span: October 19 2025 to October 29 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.6 °C
  • Mean temperature: 14.0 °C
  • Maximum temperature anomaly: 5.3 °C
  • Maximum temperature: 21.9 °C

Event center: -49.5°S 315.0°E

Area affected: 3288239 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-19_to_2025-Oct-29_315.0_-49.5

Cold spell occuring from October 17 2025 to November 01 2025 at -24.5°S 314.0°E

Download data: JSON

Event type: Cold spell

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

  • Argentina
  • Brazil
  • Paraguay

Duration: 16 days

Time span: October 17 2025 to November 01 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -3.1 °C
  • Mean temperature: 18.7 °C
  • Minimum temperature anomaly: -9.4 °C
  • Minimum temperature: 8.6 °C

Event center: -24.5°S 314.0°E

Area affected: 6147334 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_2025-Oct-17_to_2025-Nov-01_314.0_-24.5

Heat wave occuring from October 11 2025 to October 19 2025 at -11.5°S 317.0°E

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

Cold spell occuring from October 08 2025 to October 12 2025 at -5.5°S 300.5°E

Download data: JSON

Event type: Cold spell

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

  • Brazil

Duration: 5 days

Time span: October 08 2025 to October 12 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -2.0 °C
  • Mean temperature: 25.2 °C
  • Minimum temperature anomaly: -3.7 °C
  • Minimum temperature: 23.5 °C

Event center: -5.5°S 300.5°E

Area affected: 67781 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_2025-Oct-08_to_2025-Oct-12_300.5_-5.5

Cold spell occuring from October 08 2025 to October 12 2025 at -8.0°S 300.5°E

Download data: JSON

Event type: Cold spell

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

  • Brazil

Duration: 5 days

Time span: October 08 2025 to October 12 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.8 °C
  • Mean temperature: 24.7 °C
  • Minimum temperature anomaly: -2.8 °C
  • Minimum temperature: 23.5 °C

Event center: -8.0°S 300.5°E

Area affected: 101065 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_2025-Oct-08_to_2025-Oct-12_300.5_-8.0