They visited a family farm hit by the drought and were told of its impact and helped hand-feed some of the stock.
Prince Harry has reunited with his No. 1 fan, 98-year-old Daphne Dunne.
In keeping with the royal baby craze, Entertainment Tonight has unearthed an old interview from Hello! magazine in which the Duchess of Sussex revealed she already has a present in store for her unborn child-and it may hint at the baby's name.
Prince Harry said while rural Australians had a lot to be proud of, "I know that life has not been easy", mentioning the devastating drought.
As they arrived, it started to pour but that didn't stop the prince from addressing the crowd.
"And we also genuinely couldn't think of a better place to announce the upcoming baby, whether it's a boy or a girl, so thank you very, very much".
Harry, who has spoken about his own mental health issues following the death of his mother, called on those affected by drought to ask for help.
"He offered to stay for two weeks so we could have some more of the rain".
"[Meghan's pregnancy] just makes everything that happened over the past year disappear", Samantha Markle told The Sun on Tuesday. Prince Harry told the thousands who had come out to see the royal couple in Dubbo, about 300 km (185 miles) northwest of Sydney.
The Duke and Duchess of Sussex have learned about the Royal Flying Doctor Service in Dubbo.
The prince charmed the crowd at a picnic in the town's main park, standing at a podium in pouring rain with Meghan holding an umbrella over him, on the second day of their Pacific tour, which takes in Australia, New Zealand, Fiji and Tonga.
The Duke and Duchess of Sussex flew into the central western city on Wednesday morning, where the drought is biting hard - though showers are forecast for the day of the royal visit. They will be in Melbourne on Thursday.