A Flash Flood Warning is in effect right now for five New Jersey counties: Bergen, Mercer, Burlington, Hunterdon, and Sussex. The warning was issued August 7, 2026, at 5:54 PM EDT and runs through 9:00 PM EDT the same evening. The alert was issued jointly by the National Weather Service office in Upton, NY and NWS Mount Holly, NJ. If you are in any of these counties during that window, conditions on the ground can change faster than official updates can reach you.
What NWS Is Telling Residents to Do Right Now
The official instruction from the National Weather Service is direct: turn around, don’t drown when encountering flooded roads. That phrase is not a slogan. It reflects a documented pattern that emergency managers have tracked for decades. The NWS states plainly that most flood deaths occur in vehicles. A road that looks passable under a few inches of moving water can be hiding a washed-out surface, and the force of moving water is strong enough to carry a car off course with very little depth. The warning does not distinguish between familiar roads and unfamiliar ones. If a road has water across it, the instruction is to turn around, not to slow down and proceed with caution.
This means that during the warning period, from 5:54 PM to 9:00 PM EDT on August 7, 2026, residents and anyone traveling through Bergen, Mercer, Burlington, Hunterdon, or Sussex counties should avoid low-lying roads, underpasses, and any area where water is visible across the driving surface. The alert does not specify indoor shelter actions beyond the roadway guidance, so the clearest, most grounded thing you can do is simply keep vehicles off flooded roads for the duration of the warning.
If you are already out and encounter water across a road, do not attempt to gauge its depth visually. The NWS guidance is unambiguous: turn around. Find an alternate route or wait at a safe location until the warning expires at 9:00 PM EDT.
Why Flash Floods Catch Drivers Off Guard
Flash floods are particularly dangerous because they develop quickly and often strike roads that were dry just minutes earlier. Unlike riverine flooding, which builds gradually, flash flooding can funnel rainfall from a wide area into a single road or underpass in a short period. The counties covered by this warning span a range of terrain across central and northern New Jersey, meaning the risk is not concentrated in a single spot. Conditions can vary significantly from one end of a county to another, and a dry sky overhead does not mean the road ahead is clear.
Connecting This to Year-Round Preparedness
Flash flood events like this one are a reminder that vehicle preparedness is as important as home preparedness. Keeping an eye on active NWS alerts before leaving the house, especially during summer storm season, is one of the simplest and highest-value habits a preparedness-minded person can build. At usriskradar.com, our ongoing guidance on disaster readiness consistently points to the same principle this warning reflects: the decision you make in the first few seconds of encountering a hazard, whether to push through or turn back, often determines the outcome. The NWS and its issuing offices provide the alert; the response is yours to make. Check active warnings for your county at weather.gov before any evening drive during storm season.
For the fundamentals that apply beyond this specific alert, see our Flood Preparedness guide.
Source: National Weather Service (NWS Upton NY, NWS Mount Holly NJ). Active alert data retrieved 2026-08-07 22:00 UTC via api.weather.gov.
