Millions of people across the eastern United States face another round of thunderstorms on Saturday as Atlantic moisture, intense heat and an approaching cold front combine to produce torrential rain.
The flash flood threat stretches from the Northeast and Ohio Valley into parts of the Southeast. New York City, Washington, D.C., Charlotte and Atlanta are among the major cities within a Level 1 out of 4 risk for excessive rainfall.
A separate Level 1 out of 5 severe thunderstorm risk covers Philadelphia, Washington and other parts of the Northeast and Mid-Atlantic. Damaging wind gusts, frequent lightning and local flash flooding are the main hazards.
CITY UNDER SIEGE ⛈️: Must-watch timelapse video from across the Hudson River in Jersey City captures severe storms sweeping over New York City, swallowing the Big Apple’s world-famous skyline in dark, ominous skies. pic.twitter.com/OSYIDAnVGm
— FOX Weather (@foxweather) August 8, 2026
A high-pressure system positioned offshore is directing warm, moisture-rich Atlantic air inland across the eastern United States.
At the same time, a cold front approaching from the west is lifting the hot and humid air already in place. This unstable setup is allowing showers and thunderstorms to develop across a wide area.
High atmospheric moisture means individual storms can release large amounts of rain over short periods. Flooding becomes especially likely when thunderstorms repeatedly cross the same location, a process known as training.
Dark storm clouds rolled over the New York City skyline as severe thunderstorms moved into the area, creating an ominous scene ahead of heavy rain and flash flooding. ⛈️🏙️ pic.twitter.com/XDdGR1kyuO
— AccuWeather (@accuweather) August 8, 2026
Tri-State Area was hit by torrential rain
Severe thunderstorms swept through New York City, northern New Jersey and the surrounding Tri-State Area on Friday evening, prompting numerous severe thunderstorm and flash flood warnings.
Rainfall totals generally reached 25 to 64 mm (1 to 2.5 inches). Hail measuring around 2.5 centimetres (1 inch) was reported in Pearl River, New York.
Newark Liberty International Airport recorded a wind gust of 84 km/h (52 mph). At the height of the storms, more than 40,000 customers lost electricity in New Jersey, while approximately 20,000 outages were reported in New York and 15,000 in Pennsylvania.
Orange & Rockland Utilities restored power to more than 14,000 customers overnight. Around 320 remained without electricity at 10 a.m. Saturday, with additional thunderstorms possible across the Hudson Valley during the evening.
Hail in Pearl River from around 5:12pm today. A lot of cloud to ground lightning too. I don't think the hail was larger than a penny.@NWSNewYorkNY pic.twitter.com/GaQzIcvmwu
— Areia (@TaraAreia) August 7, 2026
Torrential rain turned roads into fast-moving waterways across several New Jersey communities.
In Hawthorne, firefighters completed 25 rescues, including the rescue of a dog trapped inside a vehicle. Goffle Road became almost completely submerged within minutes.
Flooding also affected Hackensack, Paramus, Bogota and Hoboken. Drivers struggled through deep water, while fallen trees disrupted NJ Transit services during the evening commute.
Authorities warned motorists not to ignore barricades or attempt to cross flooded roads. Even relatively shallow moving water can push a vehicle from the roadway.
Severe lightning storms and flash flooding in Hawthorne NJ. This is not a normal thunderstorm. Stay safe. pic.twitter.com/dhZaSohaxy
— WahDahTa (@WahDahTa) August 7, 2026
Lightning sparked apartment fire
A lightning strike caused a fire at the Parth Knolls Apartment Complex in Ossining, Westchester County, shortly after 7 p.m. Friday.
Flames spread through the roof of the multi-family building as the storm crossed the area. Firefighters remained at the complex into the night extinguishing hotspots, but no injuries were reported.
The incident highlights the danger from frequent lightning, which can continue well beyond the area experiencing the heaviest rainfall.
Con Edison asked approximately 114,800 customers across the Bronx and Upper Manhattan to conserve electricity while crews repaired equipment.
The utility reduced voltage by 8 per cent to protect the local system and maintain service. Around 39,600 customers were affected in parts of the Bronx, while approximately 75,200 were affected in Inwood, Hudson Heights and Washington Heights.
Residents were asked to limit air-conditioning use and avoid washers, dryers, microwaves and unnecessary electric vehicle charging until repairs were completed.
Further thunderstorms may produce flash flooding and isolated damaging winds across the Northeast on Saturday.
Widespread weekend rainfall totals of 13 to 25 mm (0.5 to 1 inch) are expected, with local amounts of 25 to 50 mm (1 to 2 inches) or more beneath repeated thunderstorms.
Areas that miss the storms will continue to experience dangerous heat and humidity. Heat advisories remain in effect across parts of New York, New Jersey, Connecticut and Pennsylvania.
Temperatures near 32°C (90°F) will feel closer to 35 to 38°C (95 to 100°F), with the highest heat index values expected across interior New Jersey and parts of Monmouth and Ocean counties.
The approaching cold front should bring lower humidity to parts of the Northeast on Sunday, but additional downpours remain possible farther south and east.
