In a study of free-burning fire modeling, both point- and area-source flames and line, fires were exposed to cross winds. With point- and area-source flames, the flame height was found to decrease slowly with the initial exposure to the cross wind and then to decrease more rapidly as the velocity of the cross wind was increased. Specifically, the dimensionless, flame height varied with the negative 1/4-power of the Froude number based on cross-wind velocity and undisturbed flame height, above a Froude number of 0.2. The horizontal extension of the flame, on the other hand, increased rapidly with increasing cross wind at first, and then less rapidly with the 1/6-power of the Froude number. When line fires composed of point sources were exposed to cross winds, the height of the flame varied with the inverse square root of the Froude number plus a constant, the value of which depends on the fuel. The tangent of the flame angle varied directly with the square root of the Froude number. These observations agree generally with those reported in the literature relative to two-dimensional fires from wood cribs, up to a value of the Froude number at which buoyancy effects on the flame seem to vanish.