There is really reason for the rumo(u)r

Var.: Где дым, там и огонь Cf: The flame is not far from the smoke (Am.). It never thunders but it rains (Am.). /There is/ no mud without a puddle (Am.). /There is/ no smoke without fire (Am., Br.). Where there are reeds there is water (Br.). Where there is smoke, there is fire (Am., Br.). Where there's reek, there's heat (Br.)