Flash flood warnings strike north-east US amid wildfire smoke from Canada

The northeastern United States is experiencing hazardous weather conditions on Saturday, combining poor air quality from Canadian wildfires with severe thunderstorms and flash flooding. Smoke from the wildfires has returned to New York City and surrounding areas, pushing air quality back to unhealthy levels after a brief respite on Friday. The region is facing a compounded weather crisis with torrential rain triggering flash flood warnings across parts of the affected area.