Crews spent the day at Colt Park Pool in Hartford, cleaning up after vandals struck.
Police said someone tossed non-toxic chemicals and lifeguard equipment into the pool and painted graffiti painted on the sidewalk.
The damage was discovered this morning, on day four of a heat wave that is expected to extend into the weekend.
Police said there were no signs of forced entry, so they believe the person responsible is familiar with pool.
Crews hope to have pool back open tomorrow.
