Environment agency Sepa said every part of the country had now reached some level of water scarcity. The weather conditions could last until early July and followed a drier than usual winter and spring. In May, Scotland only received 44% of its long-term average rainfall.
The Met Office said it was unusual for the UK's highest August temperature to be recorded in Scotland.
Scottish Water says storage levels at some sites are at 66% amid one of the driest summers in 160 years.
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