Charitable organisation Love Aid Singapore raised US$44,000 (S$59,000) to fund the solar panel project.
April and May are already among the warmest months of the year.
The operator cited high costs and a dwindling number of patrons as the main reasons behind the closure.
Her record comes shortly after her induction into the Singapore Women's Hall of Fame.
She calls the pigs her "besties".
He interpreted the gesture as one that "humiliates" China and the Chinese people.
Motorists are still choosing to "speed at locations where they think no one is watching", the police said.
One of its rescuers fed it some water from a bottle cap.
Some parents helped to design the toilets.
"Especially girls," he added.