BOSTON (WHDH) -- Wednesday was just too hot to handle for some, and as temperatures started to climb again Thursday morning, residents were already seeking out ways to keep cool.

Thursday is the first full day of the summer and, fittingly, scorching temperatures were expected to continue.

Fenway Park's medical staff had to treat fans who were affected by the heat during Wednesday’s Red Sox game.

Throughout Boston, residents spent time looking for ways to beat the heat. Spray parks were packed.

"It's better than the 50 degree weather than we were having a week ago," one woman said.

Some kids sweated it out during the last few days of classes, while others spent the day at local watering holes, because state pools won't open until the weekend and most summer camps are running yet.

Those working in the heat know drinking lots of water is more important than ever.

Health officials say the key is to stay hydrated and to stay in shaded areas as much as you can.