Fire crews have been called to over 100 grass fires across Wales since Friday leading to warnings cover is being stretched to the limit.
Some of the larger fires have been in Rhondda Cynon Taf, Bangor, Gwynedd and on Gower, Swansea.
The three Welsh fire services say some fires have been started deliberately, either maliciously or by controlled burning by land owners has quick spread.
People been warned their lives and those of firefighters are at risk.
On Monday evening South Wales Fire and Rescue Service said crews were "incredibly busy" tackling a series of grass fires in the Rhondda area.
Tomos Dafydd reports.
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