Category: Extremes affecting Viet Nam

Heat wave occuring from August 08 2025 to August 13 2025 at 23.5°N 107.5°E

Download data: JSON

Event type: Heat wave

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

  • China
  • Viet Nam

Duration: 6 days

Time span: August 08 2025 to August 13 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.0 °C
  • Mean temperature: 28.1 °C
  • Maximum temperature anomaly: 2.9 °C
  • Maximum temperature: 30.8 °C

Event center: 23.5°N 107.5°E

Area affected: 118993 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-08_to_2025-Aug-13_107.5_23.5

Heat wave occuring from July 27 2025 to July 30 2025 at 22.0°N 105.0°E

Download data: JSON

Event type: Heat wave

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

  • China
  • Viet Nam

Duration: 4 days

Time span: July 27 2025 to July 30 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.5 °C
  • Mean temperature: 28.9 °C
  • Maximum temperature anomaly: 4.2 °C
  • Maximum temperature: 32.5 °C

Event center: 22.0°N 105.0°E

Area affected: 71647 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-Jul-27_to_2025-Jul-30_105.0_22.0

Heat wave occuring from July 03 2025 to July 23 2025 at 12.5°N 109.5°E

Download data: JSON

Event type: Heat wave

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

  • China
  • Taiwan, Province of China
  • Viet Nam

Duration: 21 days

Time span: July 03 2025 to July 23 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.3 °C
  • Mean temperature: 29.7 °C
  • Maximum temperature anomaly: 3.6 °C
  • Maximum temperature: 32.8 °C

Event center: 12.5°N 109.5°E

Area affected: 801282 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-Jul-03_to_2025-Jul-23_109.5_12.5

Cold spell occuring from June 30 2025 to July 06 2025 at 17.5°N 110.5°E

Download data: JSON

Event type: Cold spell

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

  • Viet Nam

Duration: 7 days

Time span: June 30 2025 to July 06 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -1.4 °C
  • Mean temperature: 27.5 °C
  • Minimum temperature anomaly: -2.9 °C
  • Minimum temperature: 24.6 °C

Event center: 17.5°N 110.5°E

Area affected: 140535 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-Jun-30_to_2025-Jul-06_110.5_17.5

Cold spell occuring from June 20 2025 to June 25 2025 at 23.5°N 103.0°E

Download data: JSON

Event type: Cold spell

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

  • China
  • Viet Nam

Duration: 6 days

Time span: June 20 2025 to June 25 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -2.3 °C
  • Mean temperature: 20.4 °C
  • Minimum temperature anomaly: -4.7 °C
  • Minimum temperature: 15.4 °C

Event center: 23.5°N 103.0°E

Area affected: 90241 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-Jun-20_to_2025-Jun-25_103.0_23.5

Heat wave occuring from June 11 2025 to June 15 2025 at 22.0°N 103.5°E

Download data: JSON

Event type: Heat wave

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

  • China
  • Lao People’s Democratic Republic
  • Myanmar
  • Viet Nam

Duration: 5 days

Time span: June 11 2025 to June 15 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.2 °C
  • Mean temperature: 26.7 °C
  • Maximum temperature anomaly: 3.4 °C
  • Maximum temperature: 28.4 °C

Event center: 22.0°N 103.5°E

Area affected: 51635 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-Jun-11_to_2025-Jun-15_103.5_22.0

Cold spell occuring from June 08 2025 to June 13 2025 at 13.0°N 108.0°E

Download data: JSON

Event type: Cold spell

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

  • Cambodia
  • Lao People’s Democratic Republic
  • Thailand
  • Viet Nam

Duration: 6 days

Time span: June 08 2025 to June 13 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -2.2 °C
  • Mean temperature: 24.6 °C
  • Minimum temperature anomaly: -4.3 °C
  • Minimum temperature: 19.2 °C

Event center: 13.0°N 108.0°E

Area affected: 191654 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-Jun-08_to_2025-Jun-13_108.0_13.0

Heat wave occuring from May 30 2025 to June 03 2025 at 20.0°N 103.5°E

Download data: JSON

Event type: Heat wave

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

  • Lao People’s Democratic Republic
  • Thailand
  • Viet Nam

Duration: 5 days

Time span: May 30 2025 to June 03 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.6 °C
  • Mean temperature: 27.1 °C
  • Maximum temperature anomaly: 5.0 °C
  • Maximum temperature: 31.9 °C

Event center: 20.0°N 103.5°E

Area affected: 52323 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-May-30_to_2025-Jun-03_103.5_20.0

Heat wave occuring from May 30 2025 to June 09 2025 at 13.0°N 109.5°E

Download data: JSON

Event type: Heat wave

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

  • China
  • Viet Nam

Duration: 11 days

Time span: May 30 2025 to June 09 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.3 °C
  • Mean temperature: 29.8 °C
  • Maximum temperature anomaly: 3.1 °C
  • Maximum temperature: 30.9 °C

Event center: 13.0°N 109.5°E

Area affected: 388213 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-May-30_to_2025-Jun-09_109.5_13.0

Cold spell occuring from May 23 2025 to May 30 2025 at 26.0°N 100.5°E

Download data: JSON

Event type: Cold spell

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

  • China
  • Lao People’s Democratic Republic
  • Myanmar
  • Thailand
  • Viet Nam

Duration: 8 days

Time span: May 23 2025 to May 30 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -4.2 °C
  • Mean temperature: 19.5 °C
  • Minimum temperature anomaly: -9.5 °C
  • Minimum temperature: -1.7 °C

Event center: 26.0°N 100.5°E

Area affected: 1164357 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-May-23_to_2025-May-30_100.5_26.0