China is experiencing its first large-scale and prolonged rainfall process of the year from May 15 to 19, with authorities maintaining a Level-IV emergency flood response for south China's Guangdong Province and southwest China's Guizhou Province.

The latest round of rainfall is affecting both northern and southern parts of the country, bringing long-lasting precipitation, intense localized downpours and severe convective weather including thunderstorms, strong winds and short-term heavy rainfall.

Authorities said all regions and departments should strengthen risk inspections and hazard prevention efforts, prepare flood-control infrastructure, ensure rescue teams and emergency communication systems are in place, and enhance safety management at construction sites and inspections of critical infrastructure during the flood season.

Authorities warned that southern China has already experienced frequent rainfall in recent weeks, with overlapping rain zones leaving soil in some areas nearly saturated and water levels in certain small and medium-sized rivers elevated.

Authorities said priority should be given to preventing mountain floods, geological disasters and flooding in small and medium-sized rivers. Monitoring and emergency preparedness should focus on areas prone to flash floods and landslides, as well as construction camps, tourist sites, flood channels and low-lying areas.

Inspections and flood-control measures are also being strengthened for small and medium-sized reservoirs, river-related infrastructure, embankment-crossing structures and ongoing construction projects.

In northern China, authorities called for rapid emergency preparedness measures, including close monitoring of weather changes, rolling forecasts of rainfall and water conditions, improved early-warning and emergency response systems, inspections of river channels, maintenance of urban drainage networks and coordination of rescue resources and evacuation plans.