There was a 75 per cent increase recorded in the number of people injured in fires across Cambridgeshire last year.
According to Cambridgeshire Fire and Rescue Service, 77 people were injured in fires in the county in the financial year 2018/19, compared with 40 the previous year.
A spokesman said in 47 cases the victim was taken to hospital.
A report issued to the Cambridgeshire and Peterborough Fire Authority overview and scrutiny committee on May 28 outlined the fire service's performance compared with the previous year.
Noting the rise in fire-related injuries, it said: "The largest increases were related to outdoor fires in the summer months last year and within prisons across the county."
A spokesman confirmed three people suffered fire-related injuries in Cambridgeshire prisons during the period.
The spokesman said: "Despite the growth in housing in the county over the last five years and the increase in population, the number of people injured in accidental dwelling fires remains consistent over a five-year period.
"Last year the number of casualties from accidental dwelling fires was unusually low compared to the five-year average. Keeping people safe from fire in their homes is where we target a large percentage of our community safety work.
"Some of the increase in casualties has been as a result of outdoor fires, which we saw an increase in last summer.
"We've had a particularly dry winter, and we're preparing for another warm and dry summer, so we're currently undertaking community safety work targeting the public and the farming community to help them keep safe from fire and reduce the risk of a fire happening.
"To help everyone enjoy the outdoors safely, we would encourage everyone to take extra care with fires outside, making sure people following safety advice which is available on our website. If you do get into difficulty with fire, never try to tackle it yourself. The best thing to do is to keep away from the fire and call 999."