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'Torrential downpours' expected through Thursday morning: Environment Canada

Rainfall totals of 40 to 80 mm, with locally higher amounts are possible, Environment Canada says
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Rainfall warning continued for:

  • Owen Sound - Blue Mountains - Northern Grey County
  • Listowel - Milverton - Northern Perth County
  • Stratford - Mitchell - Southern Perth County
  • Mount Forest - Arthur - Northern Wellington County
  • City of Hamilton
  • Barrie - Orillia - Midland - Collingwood
  • Innisfil - New Tecumseth - Angus
  • Burlington - Oakville
  • Guelph - Erin - Southern Wellington County
  • Halton Hills - Milton
  • Newmarket - Georgina - Northern York Region
  • St. Catharines - Grimsby - Northern Niagara Region

Current details:
Rainfall with embedded torrential downpours expected.

Rainfall totals of 40 to 80 mm, with locally higher amounts possible.
Torrential downpours giving rainfall rates of 20 to 40 mm per hour at times.

This morning to Thursday morning. The heaviest rain will occur today into this evening.

Periods of heavy rainfall associated with the remnants of Hurricane Beryl will move into southern Ontario this morning. These types of weather systems can give very high rainfall rates in torrential downpours.

Rainfall amounts will likely be highly variable across the region, and some areas may receive in excess of 80 mm. Rain will taper to scattered showers from west to east tonight through early Thursday morning.

For information concerning flooding, please consult your local Conservation Authority or Ontario Ministry of Natural Resources and Forestry office. Visit for the latest details.

Heavy downpours can cause flash floods and water pooling on roads. Localized flooding in low-lying areas is possible.

If visibility is reduced while driving, slow down, watch for tail lights ahead and be prepared to stop. Watch for possible washouts near rivers, creeks and culverts.

Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to [email protected] or tweet reports using #ONStorm.