Officials are warning residents to stay off the mudflats in the Port Moody arm of the Burrard Inlet, which can act like quicksand and trap people.

The mudflats are one of the last remaining such areas on the inlet, where mud and sediment are visible when the tide is low, and officials say rescues can be costly and time-consuming.

As the weather warms and more people use the trails around the inlet, the city and firefighters say people should avoid walking on the mudflats, which can appear deceptively firm.

Port Moody Fire Rescue Deputy Chief Mike Cornish said the number of emergency calls to the mudflats increases during late spring and summer.

The mudflats are exposed when the tide is low on the Port Moody section of the Burrard Inlet. (Ethan Cairns/CBC)

"It takes crews out of th

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