Task: Translation
Input (English): Police and fire crews arrived on scene to discover a power surge in the 27th floor knocked out all communications between the police and fire departments in the city for nearly two hours.
Output (Chinese): 警察和消防人员赶到现场，发现27楼出现电源浪涌，使该市警察和消防部门之间的所有通信中断了近两个小时。