There is some recognition of the need for flood management and planning to adapt to climate change  . Australian flood estimation guidelines recommend a 5% increase in design rainfall intensity per degree global average warming . In New Zealand, the recommended increase ranges from 5% to more than 10% for shorter-duration and longer-return-period storms . Both guidelines also indicate the potential for higher increases in extreme rainfall intensity.
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report