For those of you watching the news about Tropical Storm Lala, it's looking like we'll be fine where we are in Honolulu, but the prospect for the Big Island (Hawai'i) is honestly terrifying.

Rain forecasts are predicting 20 inches (50 cm) over most of the upper slopes of Mauna Kea, with as much as 25 inches (62.5 cm) in some places. The part of my mind that does science and engineering estimates is working out "very tall mountain with 1/2 m water on it" and gibbering in a corner.