Firefighters were called to the Aquadrome in Rickmansworth this morning.
Hertfordshire Fire and Rescue was called to The Aquadrome in Frogmoor Lane at 9.35am this morning after reports of a fire on a bank.
Andrew Dawson, spokesman for Hertfordshire Fire and Rescue said: “It has been listed as a doubtful origin.
“We cannot be sure it was an accident. At this time we also don't know if its an arson."
Firefighters used backpack sprayers and buckets of water to extinguish the fire and they left the scene shortly after 10.20pm.
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