A severe thunderstorm warning has been dropped for two Manitoba municipalities that are preparing for flooding this week, along with communities in the province's Interlake region.

Environment Canada issued the warning at around 3:30 p.m. Monday for the rural municipalities of Armstrong, St. Laurent, Woodlands, Rockwood, Alexander, St. Clements and Victoria Beach.

The weather agency expanded its warning at 4:20 p.m. to include the rural municipalities of Cartier and St. François Xavier. All warnings were dropped shortly after 5 p.m.

Residents in both municipalities have been racing against time to prepare for an expected crest of the Assiniboine River this week.

Residents in the RM of Cartier have been told to raise their dikes another two feet (0.6 metres) while others are being told they need to build them.

In the nearby RM of Saint François Xavier, the same race against the crest is on and there is a need for volunteers to help with around-the-clock sandbagging. 

Parts of south-central and southeast Manitoba remain under a severe thunderstorm watch, but it was ended for other areas — including Winnipeg — shortly after 5 p.m.