An extensive cellular automata (CA) model is proposed to simulate evacuations from a large smoke-filled compartment. To be more realistic, the proposed CA model takes account of human behavior by probabilistic analysis. In the numerical tests, the phenomenon of "flow with the stream" is simulated. The results show that visibility and number of guiders can affect an evacuation significantly. By using the proposed model, these two effects can be simulated through case study. (C) 2008 Elsevier B.V. All rights reserved.