Mini substation reported to have caught fire and exploded in Riverlea Extension, Johannesburg
July 2019Published 17 Sept 2026Responsible editor: Chief Editor
- Where
- Mini substation in Riverlea Extension, Johannesburg
- Operator
- City Power
- What
- Mini substation caught fire and exploded
- Cause
- Not reported
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Companies named in the reporting of this entry (being named is not a finding of fault): City Power
What happened
A mini substation in Riverlea Extension, Johannesburg, was reported to have caught fire and exploded on the evening of 10 July 2019. Eyewitnesses said flames later died down but the unit continued to burn internally. Electricity was reported off across the whole of Riverlea, with Riverlea Extension still without supply after power was restored in other parts. Residents said City Power officials had been working on the unit earlier that day, and that officials later opened the substation to look inside and then left.
Residents said emergency services had not arrived some hours after a ward councillor reported contacting them and being told a fire engine was on its way. Residents said the mini substation stands in a school yard. Injuries, damage and the final cause were not reported.
Contributing factors
Residents said City Power had told them an overload on the local grid was behind outages affecting the area since the preceding Sunday, and that officials had been working on the mini substation earlier the same day. This account is from residents only and has not been confirmed by the utility or an investigation.
Lessons learned
- Overload on a distribution asset can lead to fire and explosion, so operators should inspect and manage load after repeated outages.
- A burning mini substation next to a school needs prompt attendance, so utilities should confirm fire service response times.
- Internal burning after flames die down requires remote isolation, so crews must verify asset status before leaving site.
More lessons on maintenance, inspection and ageing assets, fire suppression and firefighting, electrical protection and isolation, from every incident on the register.
Not yet known
- Cause of the fire and explosion
- Extent of damage to the asset
- Duration of power outage in Riverlea Extension
- Age and model of the mini substation
This entry is updated when these are reported. Get an alert for the next one like it.
Source
Published 2026-09-17. Written from public reporting. Descriptive, not investigative. See the data accuracy disclaimer.
