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Heavy storms have hit southwest China's Sichuan province for the past three days, leaving 13 dead and 20 others missing.
Forecasters say the situation is likely to deteriorate as more rainfall is expected.
Some cities have recorded the heaviest rainfall in their history. Torrential rain caused flooding in Chenhe township, killing four people and 16 others are missing. Rescuers are continuing to search for them and disaster relief efforts are under way in the worst hit areas.
Some mountainous areas in Central China's Henan province have also experienced rainstorms since Friday. Four people have been killed and two are missing. More than ten thousand residents have been evacuated.