After extensive floods on Thursday, the Debe Hindu school has reopened.
Cleaners came to the school from 4 am on Friday to sweep out the slush which flowed into the classrooms from a river which runs parallel to the school.
Only half of the 390 pupils turned up for classes.
A team from the Ministry of Works also visited the school yesterday to see what can be done to keep out the river flow from invading the school.
Video of flooding in San Juan submitted by Jodi Maraj.
Government workers carry out repairs on the St Francois Valley Road affected by flooding on Monday.
The Met Office is warning that there is a 70% chance of one or two showers becoming heavy and thundery during the early afternoon.
Already, several parts of the country are experiencing rainfall, including some thunder showers.
The Met Office says the country will be cloudy at times with intermittent showers in varying localities.
It adds that gusty winds and street/flash flooding are likely in heavy showers and thundershowers.