The Coast Guard joined rescue efforts Sunday near Charleston, as rain continued to fall on the area, part of a storm system causing flash flood emergencies and power outages along the East Coast.

The Coast Guard Charleston Sector said it was assisting with land rescues in Berkeley County, near Huger, which is north of Charleston.

The National Weather Service's Charleston South Carolina Forecast Office said that Charleston received 11.5 inches of rain on Saturday, making it the wettest day on record for the city.

Over the next two days, parts of eastern South Carolina and North Carolina could receive 10 more inches of rain.

Other sections of South Carolina experienced incredible amounts of rain. Columbia received over 7 inches Saturday night, while North Myrtle Beach accumulated more than 15 inches worth of water in the past few days.

South Carolina's Greenville-Spartanburg Airport got 2.3 inches of rain Saturday, breaking the record of 0.77 inches back in 1961, according to NWS meteorologist John Tomko.

\"PHOTO:
Chuck Burton/AP Photo
PHOTO: Cars are parked in front of a flooded apartment building in Columbia, S.C., Oct. 4, 2015.
>

A flash flood emergency was issued for Berkeley and Charleston counties, with catastrophic flash flooding expected, according to NWS. A flash flood emergency was also issued for southern portions of Dorchester County, the NWS tweeted, which was characterized as a \"life-threatening situation.\"

Meanwhile, Charleston County Emergency Management reported swift water rescues taking place in Charleston, North Charleston, Ladson, Cainhoy and Awendaw, with evacuations continuing in Shadowmoss.

Mario Formisano, emergency management director for Dorchester County, said that the flooding has been widespread and that there were about 140 rescues Saturday evening into Sunday morning. He added that SUVs and trucks were being used to rescue trapped residents, and that those rescued or evacuated were taken to Summerville High School.

According to the South Carolina Emergency Management Division early Sunday morning, more than 29,000 electric customers were without power throughout the state. It also reported that there are 83 road closures across South Carolina, 46 of them in Charleston County.

#bmw #cars don't go through #charlestonfloods too well. #calhounstreet in #downtown #charleston #southcarolina #lowcountry #charlestonsc

A photo posted by Colin Pearson (@colpear) on Oct 3, 2015 at 7:17pm PDT

In downtown Charleston Saturday, roads were closed to incoming traffic as rain flooded roads and left some drivers stranded as their vehicles were surrounded by water. Meanwhile, inland parts of South Carolina were also hit hard by the rain.

The mid-Atlantic region was also affected by flooded roads and power outages were reported in several states.

Fun times kayaking ok King & Huger #chswx #charlestonsc #kayak #flood #joaquin

A photo posted by Andrew Donnan (@theadonnan) on Oct 3, 2015 at 9:34am PDT

In response to the storm, President Obama declared a state of emergency in South Carolina, which will bring federal assistance to state and local efforts.

Rachel Katz, Will Gretsky, Matthew Foster, and The Associated Press contributed to this report.

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