Extreme Heat Risk in Johannesburg, South Africa
Risk Level: Extreme — Score 9/10
Live Extreme Heat alert status near Johannesburg
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Live extreme heat map around Johannesburg
Shows extreme heat warnings and events that are active right now, refreshed through the day. When none are active, the map is empty by design.
Key Risk Factors
- High risk rating for Johannesburg based on ThinkHazard (Extreme heat)
- 5 events on record in proximity
- 1 event(s) in the last 12 months
- History of dangerous heat waves and extreme temperatures
Peak season: June-September
Last significant event: Extreme Heat - Southern Africa (2025-01-23) — 36,808,000 people exposed
Highest Risk Cities for Extreme Heats
How Johannesburg Compares
Notable Extreme Heat Events Near Johannesburg
DisasterAWARE's historical archive records 5 notable extreme heat events near Johannesburg, ranked below by impact. The most impactful: Extreme Heat - Southern Africa (January 2024) — 51,920,500 people exposed; $449,319M capital exposed.
Extreme Heat - Southern Africa
January 24, 2024 — WARNING
51,920,500 people exposed; $449,319M capital exposed
Extreme Heat - Southern Africa
January 22, 2025 — WARNING
36,808,000 people exposed; $744,469M capital exposed
Extreme Heat - Southern Africa
January 25, 2023 — WARNING
Impact data not available
Extreme Heat - South Africa
December 23, 2020 — WARNING
Impact data not available
Extreme Heat - Central and Northern South Africa
November 25, 2019 — WARNING
Impact data not available
Extreme Heat Preparedness Tips
- 1.Stay hydrated — drink water regularly even if you don’t feel thirsty
- 2.Avoid outdoor activities during peak heat hours (10 AM – 4 PM)
- 3.Know the signs of heat exhaustion and heat stroke
- 4.Check on elderly neighbors and those without air conditioning
- 5.Never leave children or pets in a parked vehicle
Related Pages
How this data is built
Johannesburg, South Africa extreme heat risk combines Historical Event Intelligence with authoritative hazard modeling from the Geospatial Intelligence Layers catalog. Live extreme heat monitoring is available through the Event Intelligence API and the DisasterAWARE Platform.
The data behind this page
Every score and event here comes from DisasterAWARE's hazard database — available as downloadable historical datasets and a real-time API.
Monitor Extreme Heat Risk in Real Time
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