There’s a lifeguard shortage across the city that doesn’t bode well for beachgoers and those looking to cool off from the heat in the city’s pools. As a result, beaches have been forced to limit the space where people can swim and pools now have fewer programs and hours. (Last week, one man was arrested for an off-hours dip at Rockaway Beach. The time? Just before 7 p.m.) More pressure is being placed on current lifeguards to show up to work and pick up more hours to provide adequate coverage.