On Friday, 24 March 2017 01:13:18 UTC+1, Chris L Peterson wrote:

I'm not sure a dust storm on Mars poses much risk to someone on the
surface. The dust grains themselves could be abrasive and do some
surface damage to a suit, but otherwise, you'd hardly notice the
fastest winds on Mars, which have less energy than a mild breeze on
Earth.

That's an interesting point.

Conversely, the slightest breeze on Venus is equivalent to a hurricane on Earth.