The proposed changes follow a review by Lincolnshire Fire and Rescue.
People living near grassland in Lincoln say a discarded cigarette or glass could spell disaster.
Lincolnshire Fire and Rescue spent four days tackling the agricultural building fire near Bourne.
Two semi-detached homes in Metheringham have been badly damaged in the blaze, the fire service says.
Firefighters remain in Pointon, near Bourne, dealing with the blaze that started on Saturday.
Lincolnshire crews are called to deal with fires in Kirton Holme, Billinghay and Pointon.
Firefighters have "strongly advised" people not to use barbecues outside designated areas.
Firefighters across East Yorkshire and Lincolnshire have tackled multiple wildfires in recent days.
The returning Lincolnshire firefighters say the search and rescue conditions were challenging.
