The Workplace Heat Risk Assessment Tool

UK workplaces weren't built for 35°C. The law saw this coming: there's no maximum legal temperature, but every employer has to assess heat as a risk and act on it. Most don't — not because they don't care, but because nobody hands them a straight way to do it.

So I built one.

This tool walks you through a proper workplace heat assessment in about ten minutes, using the HSE's own six-factor framework — the recognised method, not something I invented. You answer plain questions about your workplace; it works out the risk level, tells you which controls actually apply, and prints a dated record you can put straight in your health & safety file.

What you get:

A guided assessment across the six HSE heat factors — temperature, radiant heat, airflow, humidity, clothing/PPE and work rate — plus exposure, hydration and at-risk workers

A clear risk level from Low to Severe, with the reasoning shown so you can see exactly why

A prioritised list of recognised control measures matched to your answers — what to fix, in what order

A flag for higher-risk workers who need an individual assessment, including the legal duty around pregnant and new mothers

A temperature log, an action checklist you sign off, and a built-in review-date prompt

A clean, professional printout — the document that shows you actually did the assessment

The honest version: there are free blank templates out there. They hand you an empty form and assume you already know what good looks like. This does the opposite — it walks you through it, makes the risk call with you, and gives you the finished record. That's the difference between "here's a form" and "here's it done."

It's a single file that runs in your browser. No account, no subscription, no install — download it once and it works offline, on any device, for good. Nothing you type ever leaves your computer.

Straight talk on what this is: an assessment aid, not legal advice and not a guarantee of compliance. It helps you carry out and document your own assessment using the HSE framework — it doesn't replace a suitable and sufficient risk assessment or professional advice where your situation needs it. Always check current guidance at hse.gov.uk and acas.org.uk.