Weather

Heavy rain is possible across the region later today. tonight and tomorrow. A flood watch is in effect from 5 p.m. today through tomorrow afternoon.

Strong thunderstorms are forecast to impact the local area this morning through about 8:15 a.m., according to the National Weather Service.

Hot temperatures and high humidity will produce heat index values up to 97° F. on the East End and 100+ across the rest of the island and in NYC today and tomorrow.

Air quality and heat advisories are in effect for Long Island and NYC today due to high heat, humidity and smog.

Riverhead Town will open its Shade Tree Lane Senior Center as a cooling center both days and urges residents to take precautions to avoid heat illness, which can be dangerous.

An air quality health advisory has been issued for Long Island by the State Department of Environmental Conservation and will remain in effect through 11 p.m., the Suffolk County health department said in a press release this afternoon. The pollutant of concern is ozone.

An air quality health advisory will be in effect again tomorrow for the Long Island region from 11 a.m. to 11 p.m.

Air quality will be “unhealthy for sensitive groups,” including the elderly, young children and people with respiratory disease (such as asthma), who should consider limiting strenuous outdoor activities, according to the advisory.

An air quality health advisory and a heat advisory will be in effect Wednesday for the Long Island region. The heat advisory will extend to 8 p.m. Thursday.

The pollutant of concern is ground-level ozone, health officials said.Air quality will be “unhealthy for sensitive groups,” including the elderly, young children and people respiratory disease (such as asthma), who should consider limiting strenuous outdoor activities, according to the advisory.