It was late on an August afternoon, the air hot and heavy like it usually was in the rainy season. Earlier we'd seen some thunderheads near the Burnt Spring Hills, but they'd passed way up to the north. I'd mostly finished my chores for the day and was heading down to the pasture with my brother, Buster, and my sister, Helen, to bring the cows in for their milking. But when we got there, those girls were acting all bothered. Instead of milling around at the gate, like they usually did at milking time, they were standing stiff-legged and straight-tailed, twitching their heads around, listening.

Buster and Helen looked up at me, and without a word, I knelt down and pressed my ear to the hard-packed dirt. There was a rumbling, so faint and low that you felt it more than you heard it. Then I knew what the cows knew -- a flash flood was coming.

As I stood up, the cows bolted, heading for the southern fence line, and when they reached the barbed wire, they jumped over it -- higher and cleaner than I'd ever seen cows jump -- and then they thundered off toward higher ground.

I figured we best bolt, too, so I grabbed Helen and Buster by the hand. By then I could feel the ground rumbling through my shoes. I saw the first water sluicing through the lowest part of the pasture, and I knew we didn't have time to make it to higher ground ourselves. In the middle of the field was an old cottonwood tree, broad-branched and gnarled, and we ran for that.

Helen stumbled, so Buster grabbed her other hand, and we lifted her off the ground and carried her between us as we ran. When we reached the cottonwood, I pushed Buster up to the lowest branch, and he pulled Helen into the