Firefighters tackling a shed fire in Whitwell set up an exclusion zone after potentially deadly gas cylinders were discovered.
A crew from Clowne station were sent to extinguish the blaze at 11.50 am on Jubilee Gardens.
Residents were advised to stay indoors. The incident was closed at 2.52pm when the cylinders were judged to have cooled down.
A Fire Services spokesman said the owner of the shed had been advised not to disturb the bottles for the next 14 hours.