Freezing temperatures Thursday gave residents of a senior home in Gainesville an unwelcome surprise when water pipes burst. The bursting pipes caused the roof of one room to cave in and resulted in severe flooding in a wing of the retirement community. Plumbers and electricians were called to Summer’s Landing At Limestone, at 2030 Windward Lane, after 1 p.m. when fire alarms began ringing, alerting staff to the situation.