The National Weather Service placed a Severe Extreme Heat Watch over a broad swath of New York, effective from June 28–29 through July 3 covering counties in the Finger Lakes, Southern Tier, Central New York and the Hudson Valley. The alert is active from June 29, 12:01 p.m. EDT to July 3, 8:00 p.m. EDT for numerous upstate counties, with a separate start time of June 28, 1:48 p.m. for parts of the Hudson Valley, all ending at 8:00 p.m. on July 3. Last update: June 29, 2026.
The watch warns of dangerously hot conditions with heat index readings reaching up to 105 in many locations and potentially exceeding that threshold in some Hudson Valley areas. These levels increase the risk of heat-related illness particularly for vulnerable groups and anyone without reliable cooling. The advisory underscores the need to limit exposure, ensure hydration and secure access to air-conditioned environments as the multi-day event persists.
Counties under watch and timing through July 3
The alert covers Yates, Seneca, Southern Cayuga, Onondaga, Steuben, Schuyler, Chemung, Tompkins, Madison, Southern Oneida, Cortland, Chenango, Tioga and Broome counties from June 29, 12:01 p.m. EDT to July 3, 8:00 p.m. EDT. In the Hudson Valley, Eastern UlsterWestern Dutchess and Eastern Dutchess entered the watch earlier, from June 28, 1:48 p.m. to the same end time on July 3, 8:00 p.m.. Residents across these areas should anticipate the hottest conditions during peak afternoon hours, with warm and humid nights that may limit recovery and elevate cumulative heat stress.
Expected conditions and health risks
Forecasters indicate a combination of extreme heat and high humidity capable of producing a heat index near 105 for multiple days, and locally above 105 in the Hudson Valley segment of the watch. Prolonged exposure under these conditions increases the likelihood of heat exhaustion and heat stroke especially for older adults, young children, people with underlying health conditions and those working outdoors. The multi-day duration intensifies risk by reducing overnight relief, making it critical to monitor symptoms such as dizziness, nausea and rapid pulse, and to seek cooling and medical care promptly if needed.
Official guidance and available resources
Authorities urged basic precautions, including drinking plenty of fluids, limiting strenuous activity, and spending time in air-conditioned spaces. Individuals should avoid leaving children or pets in vehicles, as interior temperatures can rise to lethal levels quickly. Community checks on relatives and neighbors are encouraged. Anyone lacking adequate cooling or shelter can call 211 for assistance in locating cooling centers or related resources. In emergencies, dial 911. Residents are advised to stay informed and follow local guidance throughout the watch period as conditions evolve.
