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The Morrissey Hall Community Room of the Belmont Public Library, 336 Concord Ave., will be open to provide air-conditioned relief on Saturday, July 4 from 8 a.m. to 4 p.m. The

The library location replaces the Beech Street Center, 266 Beech St., as the cooling location in town. In addition, the Underwood Pool, adjacent to the library on Concord Avenue will be open from 10 a.m. to 8 p.m.

The National Weather Service has issued an extreme heat watch because of a prolonged period of dangerous heat and humidity. Dangerous heat continues into the Saturday holiday with heat indexes reaching 98F to 115F.

Persistent exposure to high heat and humidity may cause illness. All residents are encouraged to drink plenty of fluids, stay in air-conditioned buildings, avoid direct sunlight, and check on relatives and neighbors.