A rare blue supermoon could raise ocean tides and make flooding worse during Hurricane Idalia.

<div class="block">A rare blue supermoon could raise ocean tides and make flooding worse during Hurricane Idalia.</div>

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Supermoon to Make Flooding Worse During Idalia

And a rare blue supermoon could raise ocean tides and make flooding even worse. In Florida's west coast, South Carolina and Georgia, the moon is set to be closest to the earth today just as hurricane Nadal heads towards the Floridian coast. The supermoon will appear at 9:36 p.m. eastern this evening. Blue moons sometimes happen when the lunar cycle is 29.5 days long, which is just slightly shorter than the average calendar month. This means that there are two full moons in just one month and the first one actually happened on August 1st blue moons only happen every two or three years. And contrary to its name, Hanna, they're more actually a milky gray color. Keep an eye out.