From Yahoo! News:
Niagara Parks Police say a fire alarm forced staff and visitors out of the Maid of the Mist plaza in Canada for a more than an hour.
The fire call at the site of the famous Niagara Falls tour boats came in about 9:15 a.m. Tuesday. Authorities trace the alarm to dust in the building’s duct work.
- Niagara This Week – Dusty ducts shut down Maid of the Mist plaza