HEADLINERS:
Heat and air quality issues expand to cover parts of B.C., and most all of Alberta and Saskatchewan.
Heat shifts toward the Northern Rockies/Northern High Plains.
Thunderstorms with heavy rainfall are expected in the Four Corners region and from the western Gulf Coast into parts of the East.
Flooding rains hit the southern Appalachians, dangerous heat persists in the West and New England, and Tropical Storm Erin is on track to become a major hurricane. Wildfire smoke impacts parts of Canada. Stay updated on this week’s weather hazards.