While unintentional man-made disasters constitute the majority of man-made catastrophes, empirical evidence on their economic consequences remains scarce. Utilizing a unique dataset on extremely severe accidents (ESAs) in China and a nationally representative longitudinal household survey, we find that unintentional man-made disasters reduce individuals' willingness to take risks. We further demonstrate that the severity of official penalties following ESAs is positively correlated with both fatalities and economic losses, yet these punitive measures fail to mitigate the negative impact on risk preferences. Additionally, we find that ESAs reduce demand for riskier, high-return-oriented insurance products, though they do not diminish demand for protection-oriented, non-investment productslike health insurance. Our findings address a critical gap in the literature regarding the effects of unintentional manmade disasters on risk attitudes and insurance demand.