South Wales firefighters had to use thousands of litres of water to tackle a fire at a recycling centre in Llandow.
The blaze started yesterday evening and took hours to get under control.
Six fire engines and two aerial platforms were used.
No one was injured but the cause of the fire is still under investigation.
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Local authorities said the move is necessary to "avert the growing number of deaths and increasing harm linked to psychoactive substances".
Sunny and bright spells for most of us this afternoon, feeling pleasantly warm.
North Wales Fire and Rescue Service say incidents of deliberate fires are more common during the school holidays.