Current policy to manage and protect people from flooding disadvantages those who are most vulnerable.
Today's three-day weather forecast is as accurate as a 24-hour forecast in the 1990s. But floods are still particularly tricky to pin down.
In failing to acknowledge that the capacity of rivers can change quickly, some flood models and defences may not be equipped to deal with the consequences when they do.
A particular brand of climate denial among coastal property owners presents a conundrum for councils and governments trying to plan for sea-level rise.
The federal government created a program in 1968 to insure homes in the US from flooding, yet few of the houses hammered by Harvey's record rainfall were covered.
Floods are a costly part of Australian life, which means we need to get better at predicting exactly when - and how severely - they are likely to strike in the future.