The Latest on massive winter storm in the Northeastern U.S. (all times EST):

1:25 p.m.

The South is continuing to deal with frigid temperatures as a brutal winter storm batters the Northeast.

In South Florida, it’s so cold iguanas are falling from trees.

The National Weather Service in Miami said temperatures dipped below 40 degrees early Thursday. That’s chilly enough to immobilize green iguanas common in Miami’s suburbs.

In Mississippi, frigid weather is causing water pipes to burst underground in Jackson, the state’s largest city. The city has been put under a precautionary boil-water notice and portable toilets were placed outside the state Capitol because some of the toilets won’t flush inside.

In South Carolina, parts of Interstate 95 remain closed because of icy patches.

And in Tennessee, officials say the heat is mostly back on at the prison that houses the state’s male death row offenders. The facility’s heating system failed on Monday.

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12:35 p.m.

A mail carrier who works in Providence, Rhode Island, is taking the postal service’s unofficial creed to heart.

Joseph Rodriquez says snow was slowing down carriers Thursday although he was having a “pretty easy day” as he made his rounds during a storm that could drop 18 inches of snow on the state.

He says it’s important to get the mail out, even in blizzard conditions, because he delivers medication and checks.

Rodriquez says the post office had prepared for the weather by making sure carriers didn’t have to carry anything extra and by having them start early.

The postal service’s unofficial motto is “Neither snow nor rain nor heat nor gloom of night stays these couriers from the swift completion of their appointed round,” but it has been known to cancel service during severe weather.