On Saturday, July 18, 2026, the northeastern United States faced a combination of dangerous weather events as smoky skies from Canadian wildfires gave way to severe thunderstorms. These storms triggered flash flood warnings across parts of northern New Jersey and New York City, where more than 2.5 inches (6 cm) of rain fell in some locations by the afternoon.

After a brief respite on Friday, wildfire smoke returned to New York City and surrounding areas, pushing air quality back into unhealthy levels. Shifting winds are expected to gradually clear the smoke, but they are also fueling strong to severe thunderstorms across the region. Forecasters warned these storms could bring torrential rainfall, flash flooding, damaging wind gusts, and isolated tornadoes.

Videos on social media showed flooding affecting vulnerable infrastructure in New York City, including Penn Station. The flash flood warning in northern New Jersey and New York City was in effect through 2 p.m.

Beyond the Northeast, severe flooding threats extended to other parts of the US. The Devils River in southwest Texas was forecast by the National Weather Service to reach a major flood stage of up to 22 feet (6.7 meters) on Saturday morning, far exceeding the 5-foot (1.5 meters) flood stage. In Uvalde County, Texas, a bridge over the Nueces River partially collapsed after the area received months’ worth of rainfall in just days.

In Cincinnati, Ohio, residents of the Hyde Park neighborhood reported that heavy rain escalated into dangerous flooding within 20 to 30 minutes, according to WCPO.

These events highlight a widespread impact of severe weather and wildfire smoke across multiple US regions on July 18, 2026.

Sources