Growthpoint Properties, South Africa’s largest real estate investment trust, said its running out of diesel to operate generators at some of its buildings as the country grapples with the worst electricity shortage since 2019. In a letter to customers at one of its sites in Johannesburg the company said it suppliers are struggling to keep up as Eskom Holdings, the national power utility, cuts as much as 6 000 megawatts from the national grid after a pay strike disrupted operations.