HB 1031 requires the superintendent of public instruction to appoint an advisory committee by September 1, 2025, to develop recommendations for indoor temperature standards in public schools, including a maximum temperature threshold. The committee must include representatives from the Department of Health, Environmental Justice Council, State Building Code Council, and education stakeholder groups, and must report recommendations and draft legislation to the governor and legislature by January 1, 2026, with cost estimates due by July 1, 2026. The bill also adds "excessive heat" to the list of unforeseen natural events that allow school districts to cancel school days while remaining eligible for state education funding, with the superintendent authorized to define excessive heat consistent with National Weather Service guidance.