Drought-weary East End under flood watch as up to 3 inches of rain looms

The East End desperately needs rain. It may be about to get too much, too fast.

Riverhead officials warned residents Tuesday of possible flooding as repeated thunderstorms threaten to dump 2 to 3 inches of rain across the region.

A flood watch will take effect at 8 p.m. Tuesday and remain in place through Wednesday evening, according to an advisory issued by Riverhead Supervisor Jerry Halpin.

The heaviest storms could produce rainfall at rates of 1.5 to 2.5 inches per hour — enough to overwhelm drainage systems and flood roads, streams and other low-lying areas.

Additional showers are possible Thursday before conditions begin to improve, according to the National Weather Service.

Residents in flood-prone areas were advised to monitor forecasts and prepare to act if a warning is issued. Motorists should never attempt to drive through a flooded roadway.

The downpour comes amid deepening drought concerns across Suffolk County, where the first six months of 2026 were the driest start to a year in 132 years of recordkeeping, according to Drought.gov. Rainfall through June was 7.94 inches below normal.

Earlier this month, the Suffolk County Water Authority declared a Stage 1 water alert for Southold, Shelter Island, Southampton and East Hampton, citing drought conditions and record water use. Portions of the East End were experiencing severe drought, the authority said.

SCWA pumped a record 11.15 billion gallons in June as irrigation systems strained the water supply during overnight and early-morning hours. Customers were asked to avoid watering lawns unless necessary and follow odd-even watering restrictions.