Category: Extremes affecting China

Heat wave occuring from April 30 2025 to May 10 2025 at 15.0°N 109.5°E

Download data: JSON

Event type: Heat wave

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

  • China

Duration: 11 days

Time span: April 30 2025 to May 10 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 1.3 °C
  • Mean temperature: 28.7 °C
  • Maximum temperature anomaly: 2.7 °C
  • Maximum temperature: 30.4 °C

Event center: 15.0°N 109.5°E

Area affected: 309438 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-Apr-30_to_2025-May-10_109.5_15.0

Heat wave occuring from April 30 2025 to May 02 2025 at 32.5°N 111.5°E

Download data: JSON

Event type: Heat wave

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

  • China

Duration: 3 days

Time span: April 30 2025 to May 02 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 5.7 °C
  • Mean temperature: 25.2 °C
  • Maximum temperature anomaly: 8.2 °C
  • Maximum temperature: 28.4 °C

Event center: 32.5°N 111.5°E

Area affected: 67366 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-Apr-30_to_2025-May-02_111.5_32.5

Heat wave occuring from April 30 2025 to May 03 2025 at 33.0°N 107.5°E

Download data: JSON

Event type: Heat wave

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

  • China

Duration: 4 days

Time span: April 30 2025 to May 03 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 5.4 °C
  • Mean temperature: 23.2 °C
  • Maximum temperature anomaly: 7.5 °C
  • Maximum temperature: 29.0 °C

Event center: 33.0°N 107.5°E

Area affected: 52077 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-Apr-30_to_2025-May-03_107.5_33.0

Cold spell occuring from April 27 2025 to May 04 2025 at 13.0°N 90.5°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

Duration: 8 days

Time span: April 27 2025 to May 04 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -2.1 °C
  • Mean temperature: 25.6 °C
  • Minimum temperature anomaly: -6.3 °C
  • Minimum temperature: 12.8 °C

Event center: 13.0°N 90.5°E

Area affected: 993172 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-Apr-27_to_2025-May-04_90.5_13.0

Heat wave occuring from April 22 2025 to April 27 2025 at 20.0°N 100.0°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
  • Thailand

Duration: 6 days

Time span: April 22 2025 to April 27 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 2.7 °C
  • Mean temperature: 29.4 °C
  • Maximum temperature anomaly: 3.5 °C
  • Maximum temperature: 35.2 °C

Event center: 20.0°N 100.0°E

Area affected: 72674 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-Apr-22_to_2025-Apr-27_100.0_20.0

Heat wave occuring from April 21 2025 to April 27 2025 at 25.5°N 92.0°E

Download data: JSON

Event type: Heat wave

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

  • Bangladesh
  • China
  • India
  • Myanmar

Duration: 7 days

Time span: April 21 2025 to April 27 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 3.3 °C
  • Mean temperature: 27.7 °C
  • Maximum temperature anomaly: 6.5 °C
  • Maximum temperature: 33.8 °C

Event center: 25.5°N 92.0°E

Area affected: 182501 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-Apr-21_to_2025-Apr-27_92.0_25.5

Cold spell occuring from April 18 2025 to April 20 2025 at 49.5°N 85.5°E

Download data: JSON

Event type: Cold spell

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

  • China
  • Kazakhstan
  • Russian Federation

Duration: 3 days

Time span: April 18 2025 to April 20 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -7.4 °C
  • Mean temperature: -4.0 °C
  • Minimum temperature anomaly: -11.6 °C
  • Minimum temperature: -15.8 °C

Event center: 49.5°N 85.5°E

Area affected: 80708 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-Apr-18_to_2025-Apr-20_85.5_49.5

Heat wave occuring from April 05 2025 to April 11 2025 at 31.5°N 120.0°E

Download data: JSON

Event type: Heat wave

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

  • China

Duration: 7 days

Time span: April 05 2025 to April 11 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 6.3 °C
  • Mean temperature: 20.6 °C
  • Maximum temperature anomaly: 10.8 °C
  • Maximum temperature: 26.7 °C

Event center: 31.5°N 120.0°E

Area affected: 1266550 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-Apr-05_to_2025-Apr-11_120.0_31.5

Heat wave occuring from April 05 2025 to April 08 2025 at 54.0°N 121.0°E

Download data: JSON

Event type: Heat wave

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

  • China
  • Russian Federation

Duration: 4 days

Time span: April 05 2025 to April 08 2025

Statistics over entire affected area:

  • Mean temperature anomaly: 7.0 °C
  • Mean temperature: 3.4 °C
  • Maximum temperature anomaly: 10.3 °C
  • Maximum temperature: 7.5 °C

Event center: 54.0°N 121.0°E

Area affected: 96091 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-Apr-05_to_2025-Apr-08_121.0_54.0

Cold spell occuring from March 28 2025 to March 30 2025 at 51.0°N 122.5°E

Download data: JSON

Event type: Cold spell

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

  • China
  • Russian Federation

Duration: 3 days

Time span: March 28 2025 to March 30 2025

Statistics over entire affected area:

  • Mean temperature anomaly: -8.3 °C
  • Mean temperature: -12.3 °C
  • Minimum temperature anomaly: -12.5 °C
  • Minimum temperature: -18.9 °C

Event center: 51.0°N 122.5°E

Area affected: 50700 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-Mar-28_to_2025-Mar-30_122.5_51.0