The fire spread in a urban area has two different processes, e.g. a sequential and a jumping fire spread. The former is due to an integrated effect of radiation, convection and fire brands or sparks. The latter is caused solely by fire brands which is considered a significant factor of a rapid and vast fire spread. This paper relates to a stochastic modeling of urban fire spread including these two processes. Using this model, a time sequential provability of exposure for a each house and the fire spread speed corresponding to an assumed wind velocity and characteristics of the objective area can be obtained.
