UK Could Hit 36C This Week — Here's What's Going On
UK temperatures could reach 36C (97F) or higher this week, with the Met Office considering issuing rare amber or red extreme heat warnings as forecasts point to the country's fifth heatwave of an already punishing summer. Met Office meteorologist Tom Morgan said highs are likely to reach the mid-30s widely on Wednesday and Thursday across England and Wales, with a small chance of 36C in one or two spots on Wednesday in the Midlands, the M4 corridor west of London, and up towards the Midlands. Thursday is forecast as the most likely hottest day of the week, with 36C a fairly reasonable probability locally and a small chance it could get even higher (The Guardian).
The prospective amber or red warnings would be the second such issuance of the summer. The Met Office last issued amber and red extreme heat warnings in June 2026, when an amber warning covered much of southern England and south-east Wales, and a subsequent event in July saw amber warnings across England and Wales with a red alert placed on parts of the West Midlands. The extreme heat warning system uses colour-coded alerts to signal increasing risk to health, infrastructure, and daily life. Think of it like traffic lights: yellow means be aware, amber means be prepared for disruption, and red means take action now because dangerous conditions could put lives at risk.
Sunday marked the 34th day in 2026 on which temperatures exceeded 30C somewhere in the UK, equalling the record set in 1995. That benchmark, now matched before mid-August, reflects the extraordinary frequency of hot spells this year. The ongoing heat is compounding an already severe water situation. Wales and half of England are in drought, with more regions likely to be declared affected when officials meet at the National Drought Group on Monday. More than 25 million people face restrictions on water use, according to the Environment Agency, with millions under hosepipe bans — rules that stop people from using garden hoses to water plants, fill pools, or wash cars — including all South East Water and Thames Water customers.
On the health front, yellow heat-health alerts issued by the UK Health Security Agency were in place for the East Midlands, West Midlands, south-east, south-west, east of England, Yorkshire and the Humber, and London. Those alerts continued until 9pm on Tuesday but could be extended as the hot weather persists. These alerts are separate from the Met Office's extreme heat warnings and are designed to trigger protective action by healthcare providers and local authorities, particularly for vulnerable people like the elderly and those with existing health conditions.
For infrastructure operators, the combination of drought, water-use restrictions, and extreme heat creates a pile-up of problems. Railway operators face the prospect of tracks buckling, because steel rails expand in high heat and can warp. Power networks could see surging demand for cooling as people switch on fans and air conditioning, while the power grid itself becomes less efficient in hot weather. The water sector, already dealing with drought and hosepipe bans, faces the dual pressure of increased household water use during peak heat and the need to keep supplies flowing from depleted reservoirs and rivers.
The pattern of repeated heat events through summer 2026 also affects drought management. Each heatwave dries out the soil further and increases evaporation from rivers and reservoirs, leaving less time to recover between hot spells. The National Drought Group's Monday meeting will be a critical moment, as additional drought declarations would trigger further water company drought plans, potentially expanding restrictions to new regions and customers.
The broader context here is the sheer frequency. Five heatwaves in a single summer, with the 30C-day record equalled before the season's peak has fully passed, places 2026 in uncharted territory for the UK's climate record. Whether the Met Office proceeds with amber or red warnings will depend on how confident forecasters are that the high temperatures will last, but the conditions already in place — from drought to water restrictions to record-tying heat days — tell their own story about the strain this summer has produced.
