Since the end of 90', the mechanical engineering and combustion communities have manifested a growing interest in wildfires physics with a significant effort in the development of new approaches in wildfires modelling on more physical bases. Wildfires physics is certainly one of the more complex problem in fire engineering and also in combustion science. The spectra of length scales (idem for the time scales) associated to wildfires is very large (ranged between 100 μm for the flame depth to several 100 kms for the plume trajectory), coupling many non-linear physical phenomena such as the atmospheric turbulence in interaction with the vegetation and the flame, the degradation of the vegetation, the radiation heat transfer associated to the production and the transport of soot particles from the burning zone, and so on ... For all these reasons the intima understanding of wildfires behavior is very challenging, justifying easily in classifying this problem as a multiscale complex problem. The aim of this short review is to identify some progress done these last years in the understanding of the physics of wildfires and to elaborate some strategies for the future in order to propose some new approaches and engineering tools for the reduction of fire risk in impacted zones by this natural disaster, with a particular interest to the wildland urban interfaces (WUI).