Is it a tornado if it doesn't touch down?

False! A tornado can cause damage on the ground even when a visible funnel cloud has not formed. Also, if you see a funnel cloud that does not appear to be touching the ground, the wind and circulation may still reach the ground and cause extensive damage.

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How hot is lava?

Is volcanic lightning real? Volcanic lightning is a mysterious phenomenon that generally occurs at the early stages of a volcanic eruption, and it's taken scientists many years to determine its exact cause. It happens in two places: close to the ground in dense ash clouds, and high up near the stratosphere in the plume of volcanic smoke.

Moreover, can rain stop a volcano?

When it rains water seeps into the cracks between rocks in the lava dome. The lava dome is very hot so rain instantly vapourises. Hence a large rain rate is needed to get further inside cracks in the rocks. Excessive rainfall can and does impact volcanoes. You can also ask could a tornado pick up lava? This kind of twister can pick up bits of lava that it will later fling from its interior at random, much like how sharks flew out of the tornado in Sharknado. But at least there is a scientific reason why tornadoes can sometimes form within a volcanic fissure's lava fountains.

Has a tornado ever hit a volcano?

There is no recorded occurrence of a tornado forming, then moving over an active volcano. Just as tornadoes that form from severe thunderstorms over the Midwest lift dust and debris into the atmosphere, a volcano-induced vortex would draw hot ash and embers aloft.