Category: Heat waves affecting Viet Nam

Heat wave occuring from February 21 2026 to March 04 2026 at 20.5°N 110.5°E

Download data: JSON

Event type: Heat wave

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

  • China
  • Hong Kong
  • Lao People’s Democratic Republic
  • Taiwan, Province of China
  • Thailand
  • Viet Nam

Duration: 12 days

Time span: February 21 2026 to March 04 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 2.8 °C
  • Mean temperature: 24.6 °C
  • Maximum temperature anomaly: 8.2 °C
  • Maximum temperature: 29.5 °C

Event center: 20.5°N 110.5°E

Area affected: 1128611 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_2026-Feb-21_to_2026-Mar-04_110.5_20.5

Heat wave occuring from February 15 2026 to February 20 2026 at 9.5°N 105.5°E

Download data: JSON

Event type: Heat wave

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

  • Cambodia
  • Viet Nam

Duration: 6 days

Time span: February 15 2026 to February 20 2026

Statistics over entire affected area:

  • Mean temperature anomaly: 1.2 °C
  • Mean temperature: 28.1 °C
  • Maximum temperature anomaly: 2.2 °C
  • Maximum temperature: 30.3 °C

Event center: 9.5°N 105.5°E

Area affected: 112574 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_2026-Feb-15_to_2026-Feb-20_105.5_9.5

Heat wave occuring from December 18 2025 to December 27 2025 at 10.5°N 104.0°E

Download data: JSON

Event type: Heat wave

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

  • Cambodia
  • Viet Nam

Duration: 10 days

Time span: December 18 2025 to December 27 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.6 °C
  • Mean temperature: 27.8 °C
  • Maximum temperature anomaly: 2.5 °C
  • Maximum temperature: 28.8 °C

Event center: 10.5°N 104.0°E

Area affected: 106500 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-Dec-18_to_2025-Dec-27_104.0_10.5

Heat wave occuring from October 13 2025 to October 24 2025 at 10.5°N 108.0°E

Download data: JSON

Event type: Heat wave

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

  • Cambodia
  • Viet Nam

Duration: 12 days

Time span: October 13 2025 to October 24 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.2 °C
  • Mean temperature: 28.0 °C
  • Maximum temperature anomaly: 2.1 °C
  • Maximum temperature: 29.8 °C

Event center: 10.5°N 108.0°E

Area affected: 191311 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-13_to_2025-Oct-24_108.0_10.5

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

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

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