"The hospitals now serving the wounded are so few, with limited number of doctors, so there's overcrowding of wounded," said Esraa Abou Shama, a doctor at Sudan's health ministry.
Over four days of fighting nine hospitals in Sudan have been hit by artillery and 16 forcibly evacuated, the Sudanese Doctors' Union said, with none still providing a full service inside the capital.
His hospital's water and cooking gas tanks have been hit, many staff fled, and diesel fuel for the power generator is almost exhausted, he said.
Staff cannot access the morgue because of the fighting, so dead bodies are stored in rooms with air conditioning turned up.
"We all have the same problems - electricity, water, staff.