Jake Molloy, Regional Organiser of the OILC union, told STV on Monday that if reports of gas bubbling up through the water under the platform are true then the situation is likely to be "very volatile".
He said there may be a risk of explosions and of the poisonous gas hydrogen sulphide, although added that the evacuation had been quick and efficient.
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Errors with medication may cause around 1,700 deaths annually in England and contribute to up to 22,000 each year, according to research.
The deputy sheriff stood outside Marjory Douglas Stoneman school, watching the western entrance of the school for more than four minutes.
The day will feel cold, especially along the east coast where there is also a small chance of catching the odd wintry shower.