WASHINGTON (AP) - A heat wave is traveling across the mid-Atlantic region, and officials are warning residents and visitors to remain cool and hydrated.

Emergency officials say people should limit time outdoors as the temperature rises from late morning Wednesday to the afternoon.

Residents are also encouraged to drink fluids, stay in air-conditioned rooms and avoid outdoor work.

The National Weather Service has issued a heat advisory and says temperatures will be in the middle to upper 90s.

In Washington, some city pools were extending hours and Metro said passengers would be allowed to drink water Wednesday and Thursday, an exception to its policy.

The record high for the day in the Washington area is 99. The record high for the day in Baltimore is 100. Both records were set in 1931.

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