Residents of 88 Melbourne suburbs are being told to hold off on drinking their tap water today (unless it's boiled), after last night's storms caused electrical damage impacting some of the city's water supply. Yarra Valley Water, which is Melbourne's largest retail water utility, sounded the alert via Twitter this morning. "Some water may have entered our drinking water supply network that had not been treated to the usual standard," the company has warned. Power has since returned and it's addressed the initial issue, though some areas are still being supplied with water that's not been properly treated. https://twitter.com/YVWater/status/1299136129200017408 Until it resolves the problem, Yarra Valley Water is advising residents of the impacted suburbs to take precautions and bring any tap water to a rolling boil before using it to drink, brush teeth, make ice, or prepare food or baby formula. The company Tweeted that the risk of illness from drinking the water is low, but that people should see their doctor if they experience any gastro-type symptoms. It's expecting things to be fixed by this afternoon and says it will send out confirmation when the suburbs' tap water supply is back to normal quality. To make matters worse, Yarra Valley Water's website has been having some issues of its own today and has been down for part of the morning. But if you want to know which suburbs have been affected, here they are: Attwood Bayswater Bayswater North Blackburn Blackburn North Blackburn South Boronia Box Hill North Broadmeadows Bulleen Bundoora Burwood Burwood East Campbellfield Chirnside Park Coburg North Coldstream Coolaroo Craigieburn Croydon Croydon Hills Croydon North Croydon South Dallas Doncaster Doncaster East Donvale Doreen Eltham Epping Fawkner Forest Hill Glen Waverley Greensborough Greensborough Greenvale Heathmont Kalorama Kangaroo Ground Kilsyth Kilsyth South Kingsbury Lalor Lilydale Lower Plenty Meadow Heights Melbourne Airport Mernda Mill Park Mitcham Monbulk Mont Albert North Montmorency Montrose Mooroolbark Mount Dandenong Mount Evelyn Mount Waverley North Warrandyte Nunawading Olinda Park Orchards Plenty Research Reservoir Ringwood Ringwood East Ringwood North Roxburgh Park Silvan Somerton South Morang Templestowe Templestowe Lower The Basin Thomastown Vermont Vermont South Viewbank Wantirna Warrandyte Warrandyte South Warranwood Westmeadows Wollert Wonga Park Yallambie Yarrambat For updates on the water supply issue, keep an eye on Yarra Valley Water's Twitter account.