Limits are categorised as being either 'soft' or 'hard'. Soft limits may change over time as additional adaptation options that are practicable or affordable become available. Hard limits will not change over time as no additional adaptive actions are possible. When a limit is exceeded, then intolerable risk may materialise and the actor's objectives or system's needs may be either abandoned or transformed .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report