Electronic Journal of Differential Equations, Vol. 1999(1999), No. 08, pp. 1-8. Title: Partial regularity for flows of H-surfaces, II Author: Changyou Wang (Loyola Univ. of Chicago, IL, USA) Abstract: We study the regularity of weak solutions to the heat equation for H-surfaces. Under the assumption that the function $H:{\Bbb R}^3 \to {\Bbb R}$ is bounded and Lipschitz, we show that the solution is $C^{2,\alpha}$ on its domain, except for a set of measure zero. Submitted August 29, 1998. Published March 4, 1999. Math Subject Classification: 35B65, 35K65. Key Words: H-surfaces; Lorentz space; Hardy space.