Cairo Rosa, 5, visiting the park near the Hudson River to cool off on a sweltering day in June. 

Soaking in the sun at Union Square park on a sweltering day in June. 

Local high school students taking a break to walk along the Hudson River and get Popsicles on a sweltering day in June.

Taking a break from the sun in the East Village.

Staying hydrated by filling up water bottle in Union Square Park on a sweltering day in June.

Soaking in the sun at Union Square Park on a lunch break.

Keeping cool with the T-shirt hat combo on a sweltering day in June.

Sunbathers soak in the sun near the Hudson River on a sweltering day in June.

Water bottles in the city for $1.

School groups on Ellis Island ferry on June 1, 2011.

Water fountain running on low flow in Union Square on a sweltering day in June.

Reading in the sun on a lunch break in Union Square Park.

Groups of students searching for names at Ellis Island memorial on June 1, 2011.

Groups of students searching for names at Ellis Island memorial on June 1, 2011.

Soaking in the sun on the Ellis Island Ferry on June 1, 2011.

Students headed to Ellis Island enjoying on-board snacks.

The New York bound Ellis Island ferry docked at Ellis Island.

Lying on the beach at Coney Island at the start of Memorial Day weekend.

Phillip Drayton, 42, from Bay Ridge sunbathing at Coney Island on his first beach day of the year.

Lifeguards at Coney Island digging a hole so the lookout chair can be closer to the ocean at Coney Island before Memorial Day weekend starts.

Recent graduates and Brooklyn residents Molly and Leah taking a beach day before they start job hunting.

Mother with her children at Coney Island on Friday before Memorial Day.

Raymond Rodriguez, 59, from Red Hook fishing for fluke and cocktail blues at the piers at Coney Island.

Fisherman on the piers at Coney Island the Friday before Memorial Day weekend.

Students of The Calhoun School on the Upper West Side taking a day at the beach to play some volleyball.

Young girl and her father at the Coney Island beach the Friday before Memorial Day.

Ben Podkshik at the beach on Coney Island.

Anthony Wuersh, 4, with his family from Staten Island taking their first beach day of the year.

Food stand at Coney Island.

Alani Williams, 4, from Midwood having some ice cream at the beach at Coney Island.

Subway riders coming in from the city for a day at the beach.

Smoochie the 3-year old Iguana taking a walk with his owner Margaret Oliver, 51 in Prospect Park on Friday before Memorial Day.

Haley Clark, 7, playing in Prospect Park with her mother and sister.

Hop scotch lines being drawn at Prospect Park.

Central Park Summerstage Yo-Yo Ma concert on June 7.