Mark Prior<p>A bit of a history lesson for today&#39;s <a href="https://ohai.social/tags/PhotoOfTheDay" class="mention hashtag" rel="tag">#<span>PhotoOfTheDay</span></a> and it&#39;s the original typhoon warning signals. No longer used in an era of telecommunications but previously they were raised up a mast to signal to the local population that a storm was approaching. Solid enough to be seen but not solid enough to be blown away in the wind. These one in Macao are similar to the ones used in Hong Kong.<br /><a href="https://ohai.social/tags/photography" class="mention hashtag" rel="tag">#<span>photography</span></a> <a href="https://ohai.social/tags/history" class="mention hashtag" rel="tag">#<span>history</span></a> <a href="https://ohai.social/tags/TyphoonSignal" class="mention hashtag" rel="tag">#<span>TyphoonSignal</span></a> <a href="https://ohai.social/tags/macao" class="mention hashtag" rel="tag">#<span>macao</span></a> <a href="https://ohai.social/tags/china" class="mention hashtag" rel="tag">#<span>china</span></a> <a href="https://ohai.social/tags/travel" class="mention hashtag" rel="tag">#<span>travel</span></a></p>