DC FEMS: CO incident on the 1800 block of 1st St NW; improper use of a generator in basement area

See this tweet:

CO incident 1800 blk 1st St. NW. Improper use of generator in basement area. Evaluating 1 occupant. Readings indicate high CO levels.

— DC Fire and EMS (@dcfireems) January 23, 2017