Flash flooding and thunder and lightning has been striking the area, with emergency services called out as a result.
Lanes and roads have had torrents of water washing down from higher ground as drains have failed to cope with the deluge.
Areas around Berriew and Montgomery have been particularly affected, as well as Welshpool where the town's hospital where firefighters have been dealing with flooding.
Motorists are being warned to take extra care due to surface water and floods.
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