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The report quantifies how extreme heat and rainfall accelerate the deterioration of Canadian public infrastructure, increasing annual costs by $15.1B on average between 2025 and 2100 if no adaptation occurs. It compares 'reactive' and 'proactive' adaptation strategies, finding that proactive upgrades—implemented at the earliest feasible intervention—reduce average annual climate-related costs to $6.5B, a 57% reduction compared to the no-adaptation scenario. The analysis highlights that municipalities bear the heaviest financial burden, owning over 73% of the infrastructure value. A separate flood-risk assessment indicates that structural protection measures can significantly reduce future damages, though returns vary by region.