In a macroscopic approach we study giant dipole resonance (GDR) in rapidly rotating hot nuclei. Thermal fluctuations in GDR observables are treated without employing free energy parametrizations. Analysis of their consequences at low temperature and high spin suggest that the parameterizations are not sufficient in this regime. We exemplify that at low temperature the sharp shape transitions due to increasing spin could be well reflected in the GDR observables once we treat the fluctuations properly. Jacobi transition in Zr isotopes leading to hyperdeformation and their survival at higher temperature are discussed.

PACS numbers: 24.30.Cz, 21.60.--n, 24.60.Ky