The most common sources of errors in official precipitation measurement come from equipment malfunction. If the tipping bucket rain gauge breaks down, then rainfall will not be measured accurately.
For weather enthusiasts who measure their own rain, common sources of error are a bad location of the rain gauge. If the gauge is situated close to buildings or under some other kind of shelter, then it will under-report rain.
18:15 EDT An Australian Urban Search and Rescue taskforce has returned from Vanuatu after a 10-day operation to repair schools and hospitals in Port Vila after Cyclone Pam.