Hi Skidmark,
Sorry to hear about your tumble and injured knee 🙁 I recommend completing the entire base plan and shortening the race plan. Shorten the race plan by removing weeks from the beginning of the plan.
Heat adaption is most important in the 7-10 days prior to your event. The best scenario is to arrive early in Portugal and adapt to the local conditions.
Riding indoors in a heated room for low intensity workouts is a good method to heat adapt. Don’t do this for higher intensity rides or longer endurance rides. For these rides, sitting in a sauna or hot tub after the ride will stimulate heat adaptation.
Here are a few articles
– Are you prepared to race in the heat?
– USA Cycling on racing safely in the heat.
Coach Lynda