The June 17 to 18, 2026 windstorm in Niagara
On the night of June 17 into June 18, 2026, Environment Canada issued a wind statement for Niagara: southwest gusts of 70 to 110 km/h, quarter-size hail, and 50 to 60 mm of rain across an area that was already saturated from earlier rainfall. That combination, high wind plus waterlogged soil, is the primary cause of whole-tree root-plate failures where a healthy-looking tree tips over completely rather than just shedding limbs. Damage to roofs, fences, and trees was expected across the region, and the storm delivered on that across St. Catharines.
This guide uses that storm as its reference event because the facts are real and honestly dated. The advice here applies to any significant windstorm in Niagara, not only this one.
A note on how this guide works
This guide is published by Living Websites, a Niagara-based web-services company. The information here draws on publicly available Ontario insurance guidance, Environment Canada storm data, and general arboriculture knowledge about storm-damaged trees. It is not affiliated with any specific tree-removal company, and it is not advice about your specific insurance policy. Insurance figures are illustrative typical-Ontario ranges drawn from published IBC and provincial consumer sources. Confirm your own coverage with your insurer.
If a tree is on your house, your car, or a utility line right now: get clear, treat every downed line as live, call your hydro provider if a wire is involved, and photograph the damage before anything is moved. The details are in the
storm response guide.