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Hotter homes and the race for electricity

What happens to a room during a long hot spell, and who pays when a large customer reserves power it never uses?

Climate Across Systems No. 7 examines research on Cairo homes, Ethiopian nights, compound drought and rainfall extremes, alongside international electricity policy and European industrial grants.

The connections run through housing, health, water, electricity and local manufacturing.

https://ahmednadhir.com/climate/no-7

FIRST COMMENT

Web edition: https://ahmednadhir.com/climate/no-7
Three-minute briefing: https://ahmednadhir.com/climate/no-7/briefing-note

Principal sources:
https://link.springer.com/article/10.1186/s44147-026-01232-y
https://link.springer.com/article/10.1007/s44292-026-00093-7
https://www.nature.com/articles/s41467-026-78045-3
https://www.nature.com/articles/s41558-026-02767-x
https://www.iea.org/reports/powering-artificial-intelligence
https://luxembourg.representation.ec.europa.eu/actualites-et-evenements/actualites/commission-invests-eur34-billion-net-zero-technology-projects-2026-10-19_en

EMAIL NOTICE

Subject: Climate Across Systems · Edition 7 · Hotter homes and the race for electricity

Dear reader,

Welcome to Edition 7 of Climate Across Systems.

In this edition: Studies published from 14 to 20 October examine heat inside Cairo homes, warmer Ethiopian nights, moving drought and heavier rainfall.

International energy analysis and European industrial grants connect those findings with electricity bills, new technology and Kenya’s data-centre ambitions.

Wednesday · 21 October 2026

Hotter homes and the race for electricity

This week’s readings:

🏠 Cairo: Building research finds that prolonged heat can matter more indoors than the hottest outdoor temperature.

🌡 Ethiopia: Records from 160 stations bring warm nights into decisions about cooling and public buildings.

☀ West African Sahel: Researchers track drought and heat moving together, with implications for alternative grazing areas.

🌧 Southern Africa: Modelling projects more frequent extreme shifts of a rain band under high emissions.

ϟ Data centres: The International Energy Agency examines who pays when a large customer reserves power it never uses.

🏭 European industry: The European Commission selected 77 projects for €3.4 billion of support. Agreements and payments follow separately.

Read the latest edition: https://ahmednadhir.com/climate/no-7

Three-minute briefing: https://ahmednadhir.com/climate/no-7/briefing-note

Download PDF: https://ahmednadhir.com/publications/climate-across-systems-edition-07-2026-10-21-edition.pdf

With kind regards,
Ahmed Nadhir Omar

THREE-MINUTE BRIEFING

African climate planning needs to pay closer attention to the heat people experience indoors and overnight. Studies published this week in Cairo and Ethiopia bring those conditions into view. Their findings coincide with a global contest for electricity and industrial technology, raising a practical question: how can growing power systems serve new industry while keeping protection from heat affordable?

Cairo building simulations find that prolonged heat can drive cumulative indoor overheating more strongly than the peak outdoor temperature. Ethiopian station records report increasing warm extremes, including warm nights. These are different forms of evidence. Neither demonstrates the results of a cooling programme. They make the case for assessing actual rooms and testing improvements against local conditions.

Two further studies widen the geography. Compound drought–heatwave events can shift across the West African Sahel, with implications for alternative grazing areas. Long-term modelling projects more frequent extreme southward swings of a rain-bearing circulation over southern Africa under high emissions. These regional findings inform contingency planning and infrastructure appraisal, rather than local emergency instructions.

The International Energy Agency examines how electricity systems connect large data-centre customers. Such customers can support investment and spread costs, but speculative or delayed demand can leave unused assets to be paid for. The report also identifies trade-offs between cooling water and electricity. Separately, Europe selected 77 industrial projects for €3.4 billion of support from carbon-market revenue. Agreements, payments and delivery remain later stages.

Kenya’s earlier data-centre proposals bring the connection bargain into national policy. Its energy regulator, electricity licensees, water and environmental authorities hold distinct responsibilities. County governments also have an opportunity in existing public buildings. A proposed ten-facility pilot would compare cooling improvements using room conditions, electricity use, maintenance and total cost, within approved budgets and procurement rules.

The conclusion would strengthen with measured retrofit performance, credible electricity demand and signed financial terms. The six readings explain what each source establishes, where its conclusions travel and which decisions follow.