Storm tree damage in St. Catharines: what to do.

A practical guide to handling storm-damaged trees in St. Catharines and Niagara. What to do in the first ten minutes, when a hanging limb is an emergency, how home insurance treats a fallen tree in Ontario, and what to photograph before anything is moved.

The June 18, 2026 windstorm in Niagara

The peak came on June 18, 2026: Environment and Climate Change Canada's St. Catharines A station (the Niagara District Airport, climate ID 6137304) recorded a maximum gust of 76 km/h from 250 degrees that day, against 47 km/h the day before, and 76 km/h was the highest gust at any Niagara station in the whole of June 2026; Vineland Station, Welland-Pelham and Port Weller recorded 55 to 60 km/h from the same quarter. Rain on the two storm days was modest, no station above 22 mm over both; the ground was saturated because 70.5 mm had fallen at Port Weller on June 14, with 60.0 mm at Vineland Station. That combination, high wind on waterlogged soil, is the primary cause of whole-tree root-plate failures, where a healthy-looking tree tips over completely rather than shedding limbs. Whether hail fell that night is not in the station record and is not claimed here.

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.

Trees near power lines: the law names the distance and who may work inside it

Ontario Regulation 213/91 (Construction Projects) under the Occupational Health and Safety Act, subsection 188 (2), sets a hard distance from an energized overhead conductor that applies to tree work by name: no object may be brought closer than 3 m to a line rated 750 or more volts up to 150,000 volts, 4.5 m above that up to 250,000 volts, and 6 m above 250,000 volts. Section 189 gives the only escape, and it is the line owner's to grant: protective devices installed and written procedures established under the authority of the owner of the conductor. The crew cannot lift the distance by guessing the voltage; only the utility can.

The Electrical Safety Authority states that arborists and landscapers are not qualified to work in the vicinity of energized powerlines, that 444B-certified utility arborists are the ones authorized to prune, clear vegetation, fell or remove trees within the limits of approach, and that a homeowner should contact their local distribution company to remove or prune trees around overhead powerlines, because the LDC has the legal responsibility to prune trees around its assets and uses trained utility arborists. So the first call for a tree on a line is the utility that bills you for electricity, not a tree service, and a company that offers to do the line-adjacent part itself is offering work it may not lawfully do unless it holds that separate qualification and works under the line owner's written procedures.

The Occupational Health and Safety Act does not apply to work performed by the owner or occupant of a private residence to, in or about that residence, and its definition of construction expressly includes land clearing. A hired crew's workers are inside the whole protective apparatus of the Act; the homeowner on the ladder with a chainsaw is outside it, with no training standard, no limits of approach imposed on them and no inspector. That is the strongest argument against doing a storm tree yourself.

Whose tree is it, and do you need a permit

Whether removing a tree on your own land needs a permit is a municipal question with no provincial answer: the Municipal Act, 2001, subsection 135 (1), lets a local municipality prohibit or regulate the destruction or injuring of trees and require a permit, and Niagara municipalities have answered differently. Niagara-on-the-Lake requires a Tree Removal Permit application before removing any tree with a trunk of 12.5 cm or larger in diameter in its five urban areas under By-law No. 5139-19; the City of Niagara Falls lists exactly one tree by-law, and it regulates only trees on municipal property. For St. Catharines itself, the City's own by-law directory turned up only a municipal-property tree by-law when read on 2026-09-02; a private-tree permit rule could not be confirmed either way, so ask the City before cutting rather than assuming.

Where a dead-or-hazard exemption exists it is usually conditioned on someone official saying so: Niagara-on-the-Lake charges no fee for a high-risk, hazardous, dead or nuisance tree but still requires the application form, and Toronto's exemption applies only to a tree certified as terminally diseased, dead or imminently hazardous by the General Manager. A homeowner deciding on their own that a storm-damaged tree was hazardous has not met either condition; the words to check in any by-law are certified and still required.

Above the municipal layer sits Regional Municipality of Niagara By-law No. 2020-79: no person shall injure or destroy any tree located in woodlands unless exempted or holding a permit, the owner is deemed to have knowledge of and to be liable for actions on land they control, and the fines are not more than $10,000 or $1,000 per tree on a first conviction, $25,000 or $2,500 per tree after that, and $50,000 or $5,000 per tree for a corporation. The regional by-law does carry a storm exemption at section 4.13, for trees that are dead or pose a hazard to human safety or property, and a separate exemption for transmitters and distributors clearing their own lines, which is why the utility can clear a line without a permit and a tree company cannot borrow that exemption. On the Niagara Escarpment a third regime applies: under R.R.O. 1990, Regulation 828, cutting a tree is development, exempt from a development permit where the trees are a safety hazard, are dead or diseased or were damaged by natural causes, or are cut for the owner's personal use without sale, and always subject to any municipal tree by-law.

Arborist and Utility arborist are both prescribed Ontario trades under Ontario Regulation 876/21, each with a certifying examination, but neither is a compulsory trade, so a Certificate of Qualification is real and voluntary and no law requires the person removing your tree to hold it. Tree trimming, tree surgery and tree removal are a statutorily excluded industry under Ontario Regulation 175/98, Schedule 1, Part II (except tree work on a power line right-of-way), so a tree-removal business is outside mandatory WSIB Schedule 1 coverage by default unless it applies to be included. Ask for the clearance certificate and for proof of liability insurance anyway, and treat a missing clearance as a question about how the business is structured, not as proof of anything.

Permit rules move within a season; the St. Catharines private-tree question is stated as unconfirmed above rather than answered.

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. Confirm your own coverage with your insurer.