The federal heat rule contractors have braced for is stuck, maybe for good. The enforcement, though, is already here. OSHA renewed its heat National Emphasis Program on April 10, 2026, extending targeted heat inspections through 2031, and the number of those inspections has climbed from roughly 200 a year to about 2,400.
That’s the paradox crews are working under this summer. There’s no finished heat standard on the books, and under the current administration there probably won’t be one. But heat cases now make up around 6% of all OSHA inspections, and the agency is citing employers under the General Duty Clause, the catch-all that lets it act when no specific rule exists.
How the enforcement triggers work
The emphasis program leans on heat-index thresholds. Around 80°F, inspectors expect water, shade, and rest access to be available and used. Near a 90°F heat index, the expectation shifts to structured work-rest cycles, acclimatization plans for new workers, and someone watching for early symptoms. None of that is novel to a good safety program. What’s changed is that OSHA is now showing up to check, and a jobsite with no written heat plan is an easy citation.
What it means for the summer schedule
For contractors pouring concrete or hanging steel in the Sun Belt, the practical takeaway is that a heat plan is now table stakes. The biggest single load in the country right now sits in one of the hottest states: Meta’s Hyperion data center in Richland Parish, Louisiana will have thousands of workers on site through Gulf Coast summers. Heat exposure isn’t a compliance abstraction on a job like that, it’s a daily scheduling input.
The standard may never arrive. The inspectors already have. For a full picture of where the rulemaking sits, the agency’s own heat rulemaking page lays out the unfinished timeline, but the enforcement numbers are the part worth planning around.