ST. CHARLES, Mo. - Big crowds, live music and hundreds of vendors are filling the streets of St. Charles for the Festival of the Little Hills, all while the city remains under a boil water advisory.

A water main break is to blame, but city leaders say the celebration is safe and repairs should be finished soon.

The Festival of the Little Hills is one of St. Charles' biggest weekends, and this year, it's kicking off under a citywide boil water advisory. But city leaders say the show will go on.

There will be plenty of opportunities to stay hydrated at the festival and the EMTs will be on standby with plenty of water.

Organizers say they've stocked up on bottled water for vendors, residents and visitors, ensuring food and drinks remain safe.

"The festival attracts about 300,000 people annually, so when we were made aware of the boil water order, it set us back a bit, but we were able to make arrangements with pure spring out of  Earth city. This morning, we had 1,200 gallons—five gallons of bottled water," said Brent Schulz, involved with the Festival of the Little Hills.

Main street restaurants, including Lewis and Clark, are also adapting to the advisory, swapping tap water for bottled and boiled alternatives.

"We are not serving hot tap water hot coffee or tea, but we are serving bottled water and alcohol to make sure everyone is safe," said Allison Woodard, an employee at the Lewis and Clark restaurant.

As the festival crowd grows, city crews are working just blocks away repairing the break that started it all.

The City of St. Charles  provided an update on the ongoing repairs to the damaged water interconnection pipeline and an imperative reminder regarding the Water Conservation Order. More information about it can be found here.