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CALGARY — With the anniversary of the 2013 flood just around the corner, a rainfall warning is raising the anxiety level in a lot of southern Alberta communities.

On Monday, Environment Canada issued the warning for High River, Okotoks, Claresholm, Lethbridge, Taber, Milk River, Cypress Hills, Foremost, Kananaskis, Canmore, Cardston, Fort Macleod, Magrath, Crowsnest Pass, Pincher Creek and Waterton.

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Forecasters are predicting as much as 160 millimetres could fall in the Pincher Creek and Cardston areas.

However, in 2013 it took an accumulation of 345 millimetres of rain to trigger the flooding that devastated High River.

Nevertheless, the Wallaceville area of High River is now under a flood watch, with officials saying a 1.2 metre rise is possible and the forecast flows could approach flood thresholds. On Tuesday, the flood watch was expanded to the Castle River, Oldman River, Belly River, Waterton Lake, Lee and Pincher Creeks and the Little Red Deer River.