AZ HB2790

Requires the Industrial Commission of Arizona to adopt heat illness prevention standards for all industries, with specific rules for agriculture, construction, landscaping, oil and gas extraction, airport workers, mail/package delivery, and transportation/delivery workers.

Mandates employers provide employees free access to potable water with ice (one cup per 15-20 minutes baseline), shade or climate-controlled environments when temperatures exceed 80°F, and paid cool-down rest periods ranging from 15-45 minutes per hour depending on heat and activity level.

Requires employers to implement high-heat procedures including supervisor monitoring, buddy systems, emergency communication protocols, and immediate response to heat illness signs; designate employees authorized to call emergency medical services.

Establishes mandatory training in English and other languages covering heat illness recognition, prevention, hydration importance, acclimatization procedures, and emergency response for all employees and supervisors before work begins.

Creates a private right of action allowing employees to sue for violations and recover actual damages or $500 per violation (whichever is greater); prohibits employer retaliation; applies to all workers including independent contractors and day laborers regardless of immigration status.