真的是熱死人了！這幾天台灣各地熱得要命，在美國大峽谷居然也是熱到一個新境界。
大峽谷國家公園的官方推特6/22公告，提醒近期要造訪大峽谷的人，需要事先了解自己「鞋子的極限」，因為根據園方的預測，氣溫可能飆到攝氏44度，無論再強大的登山鞋都可能撐不住！
光說預測可能沒什麼感覺，園方習慣很好的發文附圖，貼出一張登山鞋「鞋底脫落」的畫面。這可是熱到連膠都融了啊！
Grand Canyon is an unforgiving environment. The heat inside the canyon can cause shoes to come apart, and heavy hiking boots can trap sweat and lead to painful blisters. Before setting off on a hike, understand the limitations of yourself and your gear. https://t.co/PLebJv4uTz pic.twitter.com/fvB4DgHcl2
— Grand Canyon NPS (@GrandCanyonNPS) June 22, 2020
雖然這雙鞋子看起來也很老舊，但飆破攝氏40度的高溫可是鐵錚錚的事實。官方真的不是在恐嚇大家，6/23日接著貼出現場實測的氣溫。位於大峽谷底幻影牧場的氣溫，居然已經超過華氏130度，直接突破攝氏50度......天啊這根本人間煉獄。
It's hot—but do you know how hot?
— Grand Canyon NPS (@GrandCanyonNPS) June 23, 2020
What many don't realize is that when the forecast calls for, say, 112°F/44°C at Phantom Ranch (Like today) this is actually a shade temperature. In the direct sun, it can feel hotter. MUCH hotter.
Hike smart! Visit: https://t.co/PLebJv4uTz pic.twitter.com/emjR5SXGpg
由於大峽谷特殊的地形，缺乏植披散熱再加上海拔落差大，巡山員經常疲於救援輕忽的遊客。你可能從峽谷邊緣出發的時候氣溫是32度，但隨著逐漸往谷底走，一不注意就開始溫水煮青蛙，一步步走向高溫的地獄而不自覺。
依照這氣溫變化的走向，看來大峽谷的巡山員們還有得忙了。
Thinking of hiking in the Grand Canyon this week? Not a good idea for the lower elevation parts of the canyon. An Excessive Heat Warning has been issued below 4000 feet through Wednesday as temperatures soar to 110F+ near the river. #azwx pic.twitter.com/5JIXWT2wRl
— NWS Flagstaff (@NWSFlagstaff) June 22, 2020
