OSHA heat rule: Where it stands for summer 2026

The federal heat illness prevention rule first proposed in August 2024 has stalled. There is no target date for a final rule. But on April 10, 2026, OSHA renewed its Heat National Emphasis Program for another five years, keeping enforcement active. Best practice remains a written heat plan, water available throughout the shift, paid rest breaks in shade, monitoring for symptoms, and a 14-day acclimatization period for new and returning workers. Several states already require these by law.