The North Thompson is currently dropping from its highest levels since 1999 after cresting last week.
The Thompson Nicola Regional District (TNRD) says the high water levels have created seepage sites in fields and properties next to the river that are only activated once or twice every 10 to 20 years as mosquito breeding grounds.
Because these sites are activated so rarely, mosquito egg density is extremely high due to generation upon generation of mosquitoes laying their eggs on these sites.
These breeding sites are characteristically shallow and will warm up quickly, thereby accelerating larval development.
The TNRD encourages property owners in areas adjacent to the river to contact the 24 Hour Mosquito Advisory Line at 250-372-5700 if they have any concerns about breeding sites. Field staff will respond to these reports as soon as they can.
They also note, that if property owners have noticed seepage ponds forming in new areas that they have not seen in the past 10 years, they should call the Advisory Line to make sure that these new habitat sites are inspected, catalogued and treated for larvae.
With the increased rainfall, they advise property owners to be watchful for standing water around their homes. This water can be capable of supporting thousands of mosquito larvae.
Swimming pool covers, potting plant saucers, bird baths and eavestroughs are viable breeding sites and should be cleaned regularly.
The TNRD is also reminding residents in areas near the North Thompson River to protect themselves when outdoors.
Make sure you wear light-coloured, tightly woven, long-sleeved shirts and long pants during the peak mosquito biting hours of dusk and dawn, and if necessary apply an approved insect repellent such as those containing DEET (30 per cent strength for adults, seven per cent for children over six months) or Lemon Oil of Eucalyptus (Off! Botanicals).