Extreme heat events are increasing in intensity and duration. Although heat adaptationplanning is increasing across the US, the effectiveness of adaptation strategies acrosscontexts remains unknown. Evaluation helps heat adaptation planners understand theimpact of investments and increase accountability. To understand how evaluation is or isnot happening in extreme heat planning, we purposively sampled and analyzed 65 plansthat would likely include extreme heat adaptation strategies. We found that although 55%(n ¼ 36) of plans included heat evaluation or monitoring plans in some form, fewer than30% (n ¼ 19) were associated with subsequent reports. Of these, only 6 wereimplemented as planned, and none were implemented at the regional or neighborhoodlevel. We also found that monitoring indicators did not match the heat impacts,vulnerabilities, and needs identified in the plan. We provide evaluation recommendationsto guide and support evaluation and monitoring efforts in the heat planning process.