At least six people were killed by floods and tornadoes that struck the northeastern United States, local media reported.
Some people were trapped in the flooded basements of their homes, and one body was recovered from a carried away car.
Governors of New York and New Jersey have declared a state of emergency, with New York Mayor Bill de Blasio calling it a "historic weather event."
In just one hour, at least 8 cm of rain fell in Central Park in New York.
The US National Weather Service has declared a flood emergency in New York, Brooklyn and Queens, and has issued a tornado warning for parts of Massachusetts and Rhode Island.