NAPLES, Fla. — Pedro Cruz, a maintenance worker at Temple Shalom, was already taking shelter there with his family when he got a call from his supervisor on Saturday afternoon.

Situated east of Interstate 75, the temple was a safe distance from the potential storm surge of Hurricane Irma.

The supervisor told Mr. Cruz to expect visitors. The temple’s multipurpose room would be temporarily housing up to 150 people, and by early evening they were arriving.

About 50 people were scattered around the room, sitting on the institutional brown carpet beneath ballroom chandeliers and sprawling on blankets. One evacuee brought lawn furniture, another a deluxe air mattress. Bags of food and water were everywhere.