The advisory came into effect on Tuesday night, after tests confirmed the presence of E. coli in the water supply.
The Winnipeg Regional Health Authority (WRHA) said the city hasn't received any reports of suspicious cases of illness.
At the news conference Wednesday, Geoff Patton, acting director of the city's water and waste department, and Helen Clark of the WRHA will provide Winnipeggers with more information on the advisory, which has resulted in stores selling out of bottled water supplies late Tuesday.
Schools turn off taps
Schools throughout Winnipeg turned off their taps after the boil-water advisory came into effect. Parents were asked to send bottled water, or water that has been properly boiled and cooled at home, to school with their kids.
At the University of Winnipeg, plastic wrap covered a water fountain in the soccer complex.
Oliver Thomas was caught off guard when he showed up with an empty bottle before his game.
"There's no water in the bottle — totally nothing. And I usually bring water from home, but they usually tell us not to, so I usually use the water fountain," he said.
Water fountains and bottle-filling stations have also been turned off at Red River College, where food services are limited as a result of the advisory.
Staff have provided residents with bottled water at the Paterson GlobalFoods Institute, where culinary, hospitality and baking programs are held. A limited breakfast will be offered to those residents on Wednesday morning, and classes won't be affected, according to a college spokesperson.