NEW YORK — A combination of dangerous heat and the risk of flash flooding is affecting parts of the eastern United States, with forecasters warning of high temperatures, oppressive humidity and periods of heavy rainfall that could create hazardous conditions along the seaboard.
The National Weather Service has issued heat-related advisories and flood alerts in parts of the Northeast and Mid-Atlantic as a series of weather systems brings both extreme heat and the potential for intense thunderstorms. Officials have warned residents to monitor local forecasts and take precautions against heat illness and sudden flooding.
Temperatures across portions of the region have climbed into the upper ranges of summer heat, with humidity pushing heat index values to levels considered dangerous by weather officials. The National Weather Service previously issued an Extreme Heat Warning for parts of southern Connecticut, northeast New Jersey and southeast New York, citing heat index values reaching around 105 degrees Fahrenheit and increased risks of heat-related illness.
The same atmospheric conditions contributing to the heat have also increased the potential for heavy downpours. Forecasters said slow-moving storms could produce intense rainfall over short periods, raising the threat of flash flooding, particularly in urban areas and locations with poor drainage.
Flood watches have been issued in portions of the Northeast and Mid-Atlantic where forecasters warned that excessive rainfall could cause flooding of streams, creeks and low-lying areas. The National Weather Service said some areas could experience runoff problems when repeated thunderstorms move over the same locations.
Officials urged people to avoid flooded roads, noting that water levels can rise quickly during flash flooding events. Emergency management agencies also advised residents to check on vulnerable populations, including older adults and people working outdoors during periods of extreme heat.
The weather pattern comes as much of the United States faces a period of elevated temperatures. Meteorologists have warned that a broad heat wave could bring prolonged above-normal temperatures across large parts of the country, with nighttime heat posing additional health risks because it can limit recovery from daytime conditions.
Forecasters continue to track the movement of storm systems and temperature trends across the East Coast. The National Weather Service has advised residents to rely on updated local alerts as conditions develop.
