Possible Clues:

• Like a 911 call (Abbr.)
• Retired, as a prof.
• "ER" part
• Kind of room at a hosp.
• The "E" in EMT: Abbr.
• Hosp. room
• The 'E' in E.R.: Abbr.
• Pt. of FEMA
• Pt. of ER or EMT
• Reason to call 911: Abbr.