Pittsburgh and more US cities face severe storms, damaging winds and dangerous flash flooding, threatening flights, roads, tourism and outdoor plans as repeated thunderstorms sweep major American travel corridors through Thursday.

Chicago, Detroit and more U.S. travel hotspots face a week of severe storms, flash flooding and flight disruptions, putting roads, airports and holiday plans under fresh pressure.

Minnesota conjoins with Wisconsin, Illinois, Ohio and more US states as the most severe Canadian wildfire smoke and heavy storms continue to disrupt air quality, travel, flight service and weather this weekend, bringing fresh risks.

New York has officially issued a statewide air quality alert as wildfire smoke and severe storms threaten millions across the state. Consequently, health officials and emergency agencies are urging residents to prepare for rapidly changing conditions.

Greenville, Spartanburg, Gulfport and more US cities are preparing for slow-moving storms, torrential rains, tropical moisture and fresh flash floods that are expected to create massive travel chaos across the southern United States. As a result, forecasters warn that repeated downpours could flood roads, disrupt flights and delay rail and road transport.