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Dew appears to be a factor in fire behavior and management, slowing and extinguishing fires in cool conditions. Higher temperatures mean less dew. Given the importance of fuel reduction fires during cool seasons to reducing fire risk in hot seasons, will reduced occurrence and extent of dew make such fires more difficult and expensive (equipment and labour) to control? Anecdotally, it was commonplace for such burning off around here (Eastern Australia) to involve lighting up in afternoon/evening with expectation the fire would go out with little or no intervention overnight - I suspect dew was a major factor. Recent winters have been warmer than longer term average, which means less dew.

Dew point-temperature relationship for different humidity levels

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  • $\begingroup$ I doubt it would make them harder to control. More likely, it will make it easier for such fires to start because of drier forest litter - eucalyptus leaves etc. $\endgroup$ – Fred Jun 16 at 2:18

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