Fonterra is preparing to truck supplies down the West Coast from tomorrow morning to ensure southerners don't miss out on their milk.
Gaps are already starting to appear in supermarket shelves after floodwater damage cut key delivery routes through Canterbury.
Both Countdown and Foodstuffs supermarket chains have confirmed the road closures will impact lower South Island deliveries and they're working to find alternative routes.
But that can mean significant diversions and delays for delivery trucks.
Reporter Tess Brunton has more.
