...Ahab sent for all the children of Israel and got the prophets together at Mount Carmel...Then the fire of HaShem came down burning up the offering and the wood and the stones and the dust, and drinking up the water in the drain....And when the people saw it they all went down on their faces and said HaShem is the Elokim....And after a very little time, the heaven became black with clouds and wind, and there was a great rain.
(hat tip - Dreaming of Moshiach blog)
and sure enough, after the fires at Carmel, that night or the next day, there was rain.
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