Fire crews are warning people to be extra careful at bonfires and firework displays as strong winds which are forecast have the potential to make events more dangerous then normal.
It follows a fire in Jersey on Saturday which the service says was caused by fireworks.
Jersey Fire and Rescue have issued advice on how to enjoy firework displays and bonfires without incident.
People are also encouraged to be mindful of the dangers fireworks can cause to pets.
Guernsey's Chief Health and Safety Officer is urging islanders to keep their firework purchases and displays to the agreed dates.
Due to the bad weather Guernsey States says people can now buy fireworks until 9 November, rather than the previous deadline being 5 November.
- Postponements and cancellations
Jersey: Bonfire night at The Farm House & L'Auberge Du Nord, St John, which was due to take place on 5 November, has been postponed until further notice due to "adverse weather conditions".
Jersey: St Martin's bonfire night in has been postponed until Saturday 16 November. The decision has been made following poor weather forecast for the weekend.