Embodiments relate to an emergency wireless link in a data center comprising a plurality of servers. An aspect includes an emergency wireless link system in a data center comprising a plurality of servers. The emergency wireless link system includes an input interface to receive an input from a sensor coupled to one of the plurality of servers or to an auxiliary system among a plurality of auxiliary systems. The plurality of auxiliary systems includes a power supply system. The system also includes a processor to compare the input with a plurality of conditions, declare an emergency based on the input matching one of the plurality of conditions, and output one or more messages corresponding with the one of the plurality of conditions based on declaring the emergency. The system further includes a transmitter to wirelessly transmit the one or more messages output by the processor.