Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Q: Passage: Floods are a natural part of the water cycle, but they can cause a lot of damage. Farms and homes may be lost, and people may die. In 1939, millions of people died in a flood in China. Although freshwater is needed to grow crops and just to live, too much freshwater in the same place at once can be deadly. Answer: floods
A:
What natural part of the water cycle can cause damage and death?