Canada wildfire smoke to be a periodic problem into August across Midwest, Northeast: Prevailing winds will direct more wildfire smoke from western Ontario into the Midwest and Northeast often well into August. Needed rain to put out the fires may be scarce.

Canada wildfire smoke to be a periodic problem into August across Midwest, Northeast: Prevailing winds will direct more wildfire smoke from western Ontario into the Midwest and Northeast often well into August. Needed rain to put out the fires may be scarce.