Nuclear power plants in California, New Mexico, Arizona and Pennsylvania are using Weather Eagle Systems in their critical operations. Due to their ‘RF-shielded design’, special thought had to go into designing a system for these plants. Severe weather emergencies, such as tsunamis, volcanoes and earthquakes are major events for nuclear power plants because they must switch to locally generated power to maintain control over their facility in case of a local power failure. Personnel at a major nuclear power plant in California installed Alert Eagle 400 decoders in 2005 after other weather alert systems in the area had missed a tornado. The Weather Eagle system receives the National Weather Service alerts and distributes them on a hard-wired internal audio signal system throughout the facility. The system has worked reliably since its installation.