The alleys behind the houses in many DC neighborhoods are too narrow for snowplows to get through, which means trash collectors haven’t been able to get in to pick up residents’ trash for a week and a half now.
But DPW still wants to come get your trash! So they’re recommending that you put your trash in dark trashbags (instead of say, white ones that blend in with the snow) and then place them on the curb instead of in the usual receptacles back in the alley.
Also note that since Monday was a holiday, the trash pickup schedule is the regular holiday schedule (so as not to cause even further confusion by creating a Snowpocalypse/Holiday hybrid).
So get your dark trash bags and haul your garbage to the curb. Look on the bright side: at least it’s too cold for it to have smelled all that much.