Fire near M25 prompts closure in Hertfordshire

Both directions closed due to risk of secondary explosions

Author: Grace McGachyPublished 11th Aug 2026

The M25 has been closed in both directions in Hertfordshire due to a significant fire at a nearby commercial premises.

The motorway is shut between Junction 22 (St Albans) and 21A.

Hertfordshire Fire and Rescue Service is addressing the blaze, which poses a risk of secondary explosions, smoke, and debris affecting the carriageway.

As a precaution, the motorway has been shut down to ensure safety.

Motorists are advised to allocate extra time for their journeys and consider alternative routes.

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