← China history collection

China history · Article 18 of 26 · 1978–2025 CE

Reform, dams & extreme heat: China’s new climate risks

People & leaders: Deng Xiaoping (1904–1997); Zhu Rongji (1928–); contemporary researchers, engineers and flood-response officials

After 1978 China changed its agricultural and economic institutions and developed immense flood-control and energy infrastructure. Today the pressures include rapid warming, extreme rainfall, river-basin drought and the social costs of building defenses.

A different strategy for food and growth

Reforms associated with Deng Xiaoping after 1978 reduced the role of collective farming and introduced greater household responsibility for agricultural production. Rising yields, improved transport and industrialization contributed to major economic growth and reductions in widespread poverty. These developments changed the ability of families to buy food and of the state to move supplies when harvests failed.

Industrialization also brought air pollution, large emissions of greenhouse gases, changing water demand and rapid urban development on floodplains. Reservoirs, levees, forecasts and power systems expanded state capacity, but each created decisions about relocation, upstream and downstream effects and whose losses would be accepted.

Flood control is an achievement with tradeoffs

Major flooding in 1998 renewed debate about forest use, wetland loss, river engineering and emergency response. The Three Gorges Dam project on the Yangtze was built for hydropower, flood regulation and navigation, while requiring very large population resettlement and altering river ecology. Flood defenses can reduce exposure to some events, yet cannot eliminate risk from extraordinary rainfall or unintended changes to land use.

The experience of 1931 reminds modern planners why deaths depend on the social conditions around the water. Better warning systems and emergency transportation can save lives, but maintenance, public trust and clear communications are just as important as concrete structures.

Heatwaves and drought in a warming climate

In summer 2022 a severe and persistent heatwave affected the Yangtze basin. A World Meteorological Organization–associated climate assessment documented significant drought, damage to agriculture and widespread effects on people and energy systems. A hot, dry season can reduce hydropower output at the same moment electricity demand increases for cooling, creating a double pressure unlike the flood-control problems of earlier eras.

The World Meteorological Organization reported major heat, floods and drought across Asia during 2024 and 2025; the 2025 report identified China among countries recording exceptional summer heat. These are measured modern conditions, not direct copies of Ming-era climatic episodes. The question that links them to China’s longer history is whether institutions anticipate hazards, distribute the costs of adaptation fairly and change course when a system proves inadequate.

Dates & developments

  • 1978 onward: Economic reforms alter agriculture, markets and food distribution.
  • 1998: Severe floods renew national focus on Yangtze flood management.
  • 2003–2012: Main phases of Three Gorges Dam operation and power commissioning proceed.
  • summer 2022: Persistent Yangtze-basin heat and drought affect farms, hydropower and energy demand.
  • 2024–2025: Regional climate monitoring documents significant heat, flooding and drought risks.

Historical references

The references provide research and historical context. Where chronicles disagree or estimates vary, the account identifies that uncertainty.