The hotels will be (hopefully, they already have) redirecting you elsewhere - conferences have been cancelled and restaurants are shutting down. You will not want to be here this week as southern Prince George's County Md. goes without water for the rest of the week. Hope you can work it out. Check Insiders for across the river choices in Alexandria or Md. or DC substitute properties. Best wishes for avoiding what would be a lodging headache.
I was just visiting National Harbor on Monday then heard about the upcoming water outage on the news that night. I feel really bad for all the residents and businesses who will be impacted as they got very little warning.