My partner Adam and I love nothing more than venturing out into our stunning and peaceful local countryside and spending our leisure time lurking in the hedgerows and along the seashore, river banks or unique Norfolk broads, peeking into every nook and cranny searching out interesting fauna and flora to spy through our binoculars or photograph with our digital cameras.

Official announcement says there are floods in the provinces of Phrae, Sukhothai, Chiang Mai, Lamphang, Lamphun, Mae Hong Son, Uttaradit, Phitsanulok, Tak, Nakhon Sawan, Nakhon Phanom, Udon Thani, Sakon Nakhon, Petchabun and Ayutthaya.

And sorry to hear that

Altogether 20 people were confirmed dead, 11 injured and one person was still missing in the flash floods that have hit various provinces in the North, Northeast and the Central Plains, the Department of Disaster Prevention and Mitigation reported on Tuesday

This popular phrase for "ill" dates back to 1827. It is commonly believed that bad weather can make you sick.

A site visitor gave his/her opinion about this idiom:
I believe that "under the weather" is an old sailor phrase. When men were sick, they would rest below deck and thus were literally "under" the weather on deck

Another site visitor gave his/her opinion about this idiom:
Moreover, the deck they were under was likely "the weather deck", meaning the most exposed deck on the ship, usually the foredeck (over the seamen's quarters at the front end of the ship) or the quarterdeck