Faith leaders and some senior health professionals are calling on the Welsh government to amend the proposal to take more account of the wishes of bereaved families. They say 93% of people in Wales support a system where the family should be able to stop organs being taken if they object.
The signatories, including the Archbishop of Wales, Dr Barry Morgan, and the Catholic Archbishop of Cardiff, George Stack, want ministers to support amendments to the Bill to ensure this 'soft opt-system' is in place.
Without it, they say, the law would be inhumane and uncaring of the feelings of relatives. It could also damage public trust and support when people fully realise the Bill's implications.
More top news
The heaviest bursts are expected in the south and east, with some western areas either remaining dry or becoming dry by dawn.
Many places will start dry, but rain in the southeast will spread to most for a time overnight.
The family of Isaac Nash who went missing after being swept out to sea last summer have presented a cheque for £10,000 to the RNLI.