Fire crews were called to tackle 'significant gorse fires' tonight in Co Fermanagh and Co Tyrone.
They say while the largest fires are now under control, they were located in Belleek and Artigarvan near Newtownstewart and at Coalisland.
A spokesperson for NIFRS said these call outs are drawing "precious resources away from where they are needed most, protecting our community."
"It is most important that we all play our part in protecting our communities during this national emergency, and to ensure that we do not add unnecessary pressures to the emergency services.
"NIFRS would remind the public to exercise common sense in the countryside. For example, always extinguish smoking materials properly; never throw cigarette ends out of car windows and be considerate in parking vehicles so as not to block access for emergency vehicles.
"The public are also reminded that deliberate setting of wildfires is a criminal offence and if you see anyone setting a fire you should call the PSNI immediately."
