How firms in the developing world adapt to changes in weather extremes will play a key role in determining their nation's economic growth. This survey of the recent microeconomics adaptation literature suggests that although firm competitiveness is negatively affected by weather events, firms may bounce back better under certain conditions. The adaptation and resilience of firms to climate change depend on their capabilities, the available information on risks, and the depth of insurance and financial markets. As real-time weather forecasting improves, firms are better informed about these risks and this affects their decisions regarding their location, production, and configuration of supply chains. A firm's resilience also depends on the quality of public investment in infrastructure and the social safety net. Understanding that market frictions can slow the pace of adaptation, the paper concludes with some insights on the options available to policy makers.