A litter of one-week-old kittens were found dumped inside a binon the hottest day of the year so far.
They were discovered wrapped inside a bag and inside a box by a member of the public.
It happened in Derby on the June 29, when temperates topped 30C.
A spokesman for the RSPCA said the kittens were dumped deliberately and whoever did it "had no intention for them to be found."
The four kittens were found without their mother and as a result will need round-the-clock care.
They will be available to be re-homed once they are eight-weeks-old and healthy.