The annual Port Huron Float down is happening on Sunday, and U.S. and Canadian Coast Guards are warning the risks for those participating in the event.

Thousands are expected to head to the St. Clair River on Sunday for the annual Port Huron Float Down.

A Detroit-based gun smuggling plot unraveled after one of the suspects involved mistook the police for his getaway driver.

A Detroit-based gun smuggling plot unraveled after one of the suspects involved mistook the police for his getaway driver.

A water main break in the North Channel of the St. Clair River has shut off water service for Harsens Island residents.

A water main break in the North Channel of the St. Clair River has shut off water service for Harsens Island residents.

A small earthquake was detected Wednesday at the Southeast Michigan-Canada border, along the St. Clair River.

He remains lodged at the St. Clair County Intervention Center.

While the river remains open for shipping, the Coast Guard has issued a marine safety broadcast and urges mariners to use caution while traveling through the area.

While the river remains open for shipping, the Coast Guard has issued a marine safety broadcast and urges mariners to use caution while traveling through the area.

Entering the United States by swimming the St. Clair River is one crime, but what a Canadian man did once he reached Michigan was another.

Houses at the historic Old Club on Harsens Island caught fire on Wednesday.

Morning 4 is a quick roundup of stories we think you should know about to start your day.

A St. Clair County man has died after he submerged his car into the north channel of the St. Clair River.

A man was killed and two others were injured when a boat struck a post on the way back from a fishing trip in Michigan, officials said.

The body of a woman who had been decapitated was found floating in the middle channel of the St. Clair River 19 years ago.

Officials said they arrested a Spanish man, a Chilean man, and a Brazilian man who took a boat across the St. Clair River to cross illegally from Canada into Michigan in the middle of the night.

Four Brazilian nationals, a driver, and two others were arrested after officials saw people being smuggled across the St. Clair River into Michigan on a jet ski, authorities said.

Officials said border patrol agents arrested three people when they tried to cross the St. Clair River from Canada into Michigan.

A Sarnia refinery’s internal sewer system overflowed during heavy rainfall Wednesday night, causing diesel to spill into the St. Clair River.

A 59-year-old man died Sunday night after driving his vehicle directly into the St. Clair River, according to authorities.

Police say a dead male has been found inside a pickup truck submerged in the St. Clair River in Port Huron.

A body was pulled from a submerged car Thursday after someone in an aircraft reported seeing a vehicle at the bottom of the St. Clair River.

The Michigan Department of Natural Resources released its weekly fishing report on Wednesday and it included some updates for people who fish in Southeast Michigan.

Authorities are working to break up an ice jam in the St. Clair River Thursday afternoon amid wintry conditions and rising water levels.

THe cold weather is doing a number on the St. Clair River.

Here's what's coming up on Local 4 News at 5.

The National Weather Service has issued a flood advisory for areas along the St. Clair River in St. Clair County due to ice blockage reported Tuesday morning.

While it was a cloudy day, temperatures Thursday afternoon ranging from the low 30s (0 degrees Celsius) in the northwest to the upper 30s (3 degrees Celsius) in the southeast were actually a little above long-term average highs for this date.

A Florida woman is facing several charges after reportedly attempting to smuggle dozens of illegal guns into Canada earlier this month.

For months, officials with the St. Clair County Sheriff’s Office and her family searched for her. The missing piece to the puzzle was found Saturday.

The family of Nadine Moses said the body is hers, but police have not confirmed that yet.

Two people were found dead inside a car that crashed through steel guardrails into the St. Clair River, authorities said.

The Blue Water Bridge in Port Huron is temporarily closed Thursday as authorities investigate a suspicious container found nearby.

The Blue Water Bridge in Port Huron is temporarily closed Thursday as authorities investigate a suspicious container found nearby.

DETROIT – Winter weather already has prompted some school closings in Metro Detroit. There is plenty of snow expected overnight Monday into Tuesday morning, so you can expect even more closings to be announced. From the Local 4Casters:A bigger storm heading this way from Texas will redevelop snow Monday evening, which will become heavy at times Monday night before winding down Tuesday morning. This should easily be a 6-to-8-inch snowfall, so total snow from what falls both Sunday night/Monday morning and Monday night/Tuesday morning could approach 10 inches in some areas. Weather forecast: 6-to-10 inches of snow tonight

DETROIT – A Winter Weather Advisory is in effect for Detroit and all of Southeast Michigan until noon Tuesday. The Valentines Day 2021 Storm that is bringing snow and ice to Texas and the Deep South is becoming Presidents Day Snow Storm 2021 for Detroit and Southeast Michigan. Two rounds of snow are due; one in the morning and the other from late Monday to early Tuesday. Two rounds of snow on the wayThere are two rounds of snow arriving in Detroit and Southeast Michigan from late tonight through Tuesday morning. AdThe second round of snow makes an impact on the region late Monday afternoon, Monday evening, Monday night and Tuesday morning.

DETROIT – A winter weather advisory is in effect for Detroit and all of southeast Michigan from midnight Sunday until noon on Tuesday. Two waves of snow will arrive, with lighter snow on Sunday and heavier snow late on Monday. Two rounds of snow on the wayThere are two rounds of snow arriving in Detroit and southeast Michigan beginning late Sunday night through Tuesday morning. Much of the snow will have slowed by Monday morning, with 1 to 3 inches possible by mid-morning. By the end of Tuesday morning, an additional 3 to 7 inches of snow accumulation are possible.

EAST CHINA, Mich. – A State of Emergency was declared in Saint Clair County due to the flooding along its titular river -- and ongoing cold weather is expected to bring more ice jams, causing more flooding concerns for residents. The National Weather Service has issued a Flood Warning for southeastern Saint Clair County until 10 a.m. Tuesday. The jam forced the St. Clair River to overflow, causing water to surround the homes nearby. READ: Ice jams cause significant flooding along St. Clair River“Came right over the top. More information on the survey can be found on the Be Ready St. Clair County website here or its official Facebook page here.

ST. CLAIR COUNTY, Mich. – A State of Emergency was declared in Saint Clair County due to the flooding along its titular river. Ice jams have caused the Saint Clair River to flood significantly. The State of Emergency was declared due to widespread damages to property caused by the flooding. Citizens who are impacted by flooding to their properties are encouraged to utilize the online self-reporting survey to catalogue and report damage. More information on the survey can be found on the Be Ready St. Clair County website here or its official Facebook page here.

AdWeekend forecastSnow showers diminish Friday night, and it’ll be very cold, with lows in the low teens (-11 degrees Celsius). Mostly cloudy and breezy on Saturday, with highs in the upper teens (-7 degrees Celsius), with wind chills between zero and 5 above zero (-15 to -18 degrees Celsius). Lows Saturday night around 10 degrees (-12 degrees Celsius). Highs Sunday in the mid teens (-8 degrees Celsius), with wind chills during the day on Sunday around zero (-18 degrees Celsius). We’ll get briefly and slightly warmer early in the week as highs return to the low 20s (-6 degrees Celsius), but a resurgence of the Arctic air appears poised to return Wednesday and beyond.

DETROIT – Here’s what you missed on Local 4 News at Noon. Metro Detroit weather: Several inches of snow before Arctic cold, more snow this weekendWe received between 2.5 and 4 inches of snow overnight, and now we are dealing with the effects of an Arctic cold front sweeping across the area. The winter weather advisory is now set to expire at 7 p.m., and the flood warning for the St. Clair River continues until 12 p.m. as ice blockages continue to cause significant flooding in some areas.

DETROIT – Snow is headed for Metro Detroit once again. Track live radar in the video player above. Have a smart TV? Watch the weather radar on your TVIf you have a smart TV (Apple, Roku, etc. ), you can go to the WDIV Local 4 Detroit channel and stream the live weather radar right there on your TV.

We received between 2.5 and 4 inches of snow overnight, and now we are dealing with the effects of an Arctic cold front sweeping across the area. We will drop through the 20s (-4 to -5 degrees Celsius) this morning, and will hover in the upper teens (-8 degrees Celsius) this afternoon. AdWeekend forecastSnow showers diminish Friday night, and it’ll be very cold, with lows in the low teens (-11 degrees Celsius). Lows Saturday night around 10 degrees (-12 degrees Celsius). Highs Sunday in the mid teens (-8 degrees Celsius), with wind chills during the day on Sunday around zero (-18 degrees Celsius).

EAST CHINA TOWNSHIP, Mich. – Three Coast Guard ice breakers from the United States and Canada have been working on the St. Clair River trying to break up ice dams. Homes along Pointe Drive in East China Township are affected. Those homes do not have basements but crawl spaces and if the water doesn’t recede soon, will be in people’s living rooms. READ: Ice jams cause significant flooding along St. Clair RiverSt. Clair County Emergency Director Justin Westmiller said the cause is a trifecta -- strong north winds, no ice bridge has formed in Lake Huron and all that ice has dumped into the river. “We got on the phone and by 3 p.m., we had federal assets from the U.S. and Canada speeding to the St. Clair River to break up the ice.”A fourth Coast Guard ice breaker will arrive Thursday morning.

ST. CLAIR COUNTY, Mich. – Ice jams along the St. Clair River caused significant flooding in Algonac to Port Huron Tuesday and Wednesday. Pieces of ice collect and dam off the river, causing it to back up. What was uncommon was the typical help used to prevent the St. Clair River from spilling over wasn’t available, causing damage all along the river. READ: Homes impacted by flooding along St. Clair RiverPumps were turned on Wednesday and by noon, the water receded at least a foot. Two ice breaking ships -- U.S. Coast Guard’s Bristol Bay and Canadian cutter The Griffon -- have been conducting operations to ease the flooding.

Here’s what you missed on Local 4 News at 5:Hear from residents as ice jams cause flooding along St. Clair RiverIce jams along the St. Clair River have flooded main roads and homes Tuesday from Algonac to Port Huron. The National Weather Service has issued a flood warning for southeastern St. Clair County until 10 a.m. Wednesday.

ST. CLAIR COUNTY, Mich. – Ice jams along the St. Clair River have flooded main roads and homes Tuesday from Algonac to Port Huron. The National Weather Service has issued a flood warning for southeastern St. Clair County until 10 a.m. Wednesday. According to the U.S. Coast Guard, two icebreaking ships -- the U.S. Coast Guard Bristol Bay and the Canadian Coast Guard Ship Griffon -- have been conducting icebreaking operations to ease the flooding. “Griffon was underway until 8:30 p.m. flushing ice that is contributing to the flooding, and both cutters will resume icebreaking operations at 6 a.m. Wednesday. Bristol Bay, normally homeported in Detroit, is staged in Algonac, Mich. for the overnight hours,” read a statement from the U.S. Coast Guard.

ST. CLAIR, Mich. Officials with the St. Clair County Health Department announced Thursday that the River Crab Blue Water Inn has been listed as a possible coronavirus (COVID-19) exposure site after an employee tested positive. July 16, 2020: Michigan coronavirus (COVID-19) cases up to 71,842; Death toll now at 6,101According to authorities, anyone who has visited the restaurant on July 5-8 may have been exposed and are encouraged to self-monitor for symptoms over the next 14 days. Employees who worked with the confirmed case have been quarantined. The health department said the management of the River Crab is working closely with health officials and the restaurant has followed all required precautions and protocols. Health officials said the situation is an important reminder that even with the recommended safeguards in place, any social gathering can pose a risk for transmission of the virus.

Riley Gleason went missing on July 12 after he jumped off a boat into the St. Clair River behind the St. Clair Inn. ST. CLAIR COUNTY, Mich. - A body found Thursday in the St. Clair River has been identified, authorities said. Gleason went missing on July 12 after he jumped off a boat into the St. Clair River behind the St. Clair Inn. The St. Clair County Sheriffs Office Dive Team was called to the scene and began to search for Gleason. He located Gleasons body in the St. Clair River off Russell Island in Clay Township about 7:45 a.m.A boat from the Algonac Fire Department responded and brought Gleasons body to the shore.

The scene of a train derailment in the St. Clair River international tunnel in Port Huron on June 28, 2019. (Port Huron City Manager James Freed)PORT HURON, Mich. - A train derailed inside the St. Clair River international tunnel in Port Huron, officials said. The scene of a train derailment in the St. Clair River international tunnel in Port Huron on June 28, 2019. (Port Huron City Manager James Freed)The scene of a train derailment in the St. Clair River international tunnel in Port Huron on June 28, 2019. (Port Huron City Manager James Freed)Copyright 2019 by WDIV ClickOnDetroit - All rights reserved.