Global National: July 23, 2023 | Nova Scotians assess damage after historic floods

In tonight's top story: Water levels are receding, at least in some areas hit the hardest by the flooding in Nova Scotia. That is giving a better sense of some damage caused by the powerful storm over the weekend. As Callum Smith reports, three months worth of rain was reported in under 24 hours, and people are now trying to pick up the pieces.

In other natural disasters, authorities in Greece say they have carried out the largest peacetime evacuation in the country's history. Thousands of residents and tourists on the island of Rhodes fled for safety this weekend, as wildfires – fanned by extreme winds – approached towns and resorts. As Redmond Shannon reports, many people were forced to sleep on beaches or streets.

To the war in Ukraine, where Russian forces continue to hit hard on Odesa. For days, the Ukrainian port city has endured non-stop airstrikes in retaliation for recent attacks on Crimea. They have now damaged one of the country's most important heritage sites. Mackenzie Gray has more on the latest round of destruction and the toll it's taking on Ukrainians.

Plus, the U.S. Department of Justice is threatening to sue Texas Gov. Greg Abbott over a controversial floating border wall, which sits in a river that forms the legal border between the United States and Mexico. Experts say not only is its construction unlawful, but it's dangerous, too. Jamie Mauracher reports.

And, some people who contracted COVID-19 mysteriously experienced no symptoms at all. Research out of University of California San Francisco may have discovered the reason behind the phenomenon: the human leukocyte antigen, a molecule that assists the immune system during infection. Elizabeth Zogalis reports.

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