This map contains a choropleth map of thunderstorms found on the East Coast. The only states not covered are the New England territories. The total amount is in decimals, which is because of the "breaks" feature of the index.
Heavy rainfall from thunderstorms can lead to flooding, soil erosion, and infrastructure damage; lightning strikes can start fires; and strong winds can harm crops and property. Nevertheless, thunderstorms also bring beneficial rain for plants and can help fix nitrogen in the soil through lightning activity.