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Dina Rudick/Globe Staff
Boston Marathon runners doused themselves with water at the halfway water station in Wellesley.
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Dina Rudick/Globe Staff
The Wellesley water station continued to provide relief to runners of the second-slowest Boston Marathon since 1985.
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Dina Rudick/Globe Staff
The heat in Wellesley took its toll.
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Dina Rudick/Globe Staff
Overheated runners took advantage of a water station at the halfway mark in Wellesley.
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Michael Dwyer/Associated Press
High temperatures, like those experienced at the Wellesley watering station, may have convinced thousands of entrants to skip Monday's Marathon.
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Michael Dwyer/Associated Press
Empty water cups littered the course near a Wellesley watering station.
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Dina Rudick/Globe Staff
A female runner collapsed at the halfway mark next to Wellesley College. She was immediately taken away on a stretcher by Wellesley fire department staff.
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John Blanding/Globe Staff
Joe Verdone hosed off overheated runners climbing Heartbreak Hill in Newton.
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John Blanding/Globe Staff
Harvard residents Jen Schoenberg (left) and Mary Hawes were waited on Commonwealth Avenue in Newton for Schoenberg's husband, Jon Schoenberg, who was running his 20th Marathon.
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John Blanding/Globe Staff
Martiza Rodriguez, from Ecuador, cooled off at water station at Heartbreak Hill in Newton.
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John Blanding/Globe Staff
A runner was transported across Commonwealth Avenue from the medical tent to an ambulance at Heartbreak Hill in Newton Monday.
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John Tlumacki/Globe Staff
A heated runner was helped across the finish line.
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David L. Ryan/Globe Staff
A runner was transported across the finish line.
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Charles Krupa/Globe Staff
John Ouweleen, 71, of Sebastian, Fla., was helped by medical workers when he cramped up after finishing the race.
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David L. Ryan/Globe Staff
A runner collapsed at the finish line.
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David L Ryan/Globe Staff
American Tyrell Heaton was helped to the finish line by Canadian Jeff Fyfe, left, and American Blake Whitney.
