Staffordshire Fire and Rescue Service went to an incident at Queen’s Hospital and Hobbycraft, Burton-on-Trent yesterday.
Two fire engines from Longton and one from Burton attended, after four Hobbycraft employees went to the hospital's A&E department after coming into contact with the substance.
The powder was later identified as Napthalene, which is a low risk product, and used to fumigate products shipped from abroad.
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Remaining rather cloudy, but the patchy light rain will ease and clear during the evening.
Outbreaks of rain or sleet will soon clear east this evening to give some clear spells overnight.
Here are some of your great weather pictures from this weekend.