The National Weather Service has issued a severe thunderstorm warning for Douglas County, which is expected to produce winds of up to 60 mph and quarter-sized hail. The warning is in effect until 4:15 p.m. According to the weather service, lightning strikes the United States approximately 25 million times each year, mostly during the summer. The risk of lightning-related incidents increases as thunderstorms approach, reaching its peak when the storm is directly overhead. To ensure safety during a thunderstorm, establish a clear plan for seeking shelter and avoid using corded phones, electrical devices, and other electrical devices.