A "brownout" is a temporary drop in voltage in an electrical power supply system. Unlike a blackout, which results in a complete loss of power, a brownout causes lights to dim and electrical devices to operate inefficiently. This can happen during periods of high demand, such as hot summer days when many people are using air conditioning. Brownouts can affect homes, businesses, and even critical services like hospitals. They may lead to disruptions in daily activities and can damage sensitive electronics. Utility companies often implement brownouts to prevent a total blackout and maintain the stability of the power grid.