"Recently, Alexandra, Tembisa, Hillbrow, Newtown, Yeoville and the Soweto suburbs of Pimville and Zola [in Johannesburg] have become major hotspots. Hotspots are not only in high-density areas but now also low-density areas."
Gauteng premier David Makhura said admissions to public hospitals at the beginning of January jumped from 700 to more than 2,400 this week.
"In the last week, fatalities increased significantly," he said.
"The fatalities in the last week of December compared to the first week in January jumped by 135%, and by 155% in the second week of January, with over 400 deaths a week." He said the second wave had not yet reached its peak.
He said super-spreader events in Tshwane involving young people were driving the Gauteng infections.
Makhura said the province had "some disruptions" to its alternative building technology projects to provide beds at the George Mukhari, Jubilee (both in Pretoria), Kopanong and AngloGold Ashanti hospitals.
"We are installing another 1,000 beds at Nasrec," said Makhura's spokesperson, Vuyo Mhaga.
He said the Gauteng government had decided not to build field hospitals, but to increase infrastructure at hospitals to be used after the Covid crisis.