To answer your question, they are generally not dangerous to humans. In the USA, most scorpions have a sting comparable to a bee or wasp sting, painful but not life-threatening except to someone whose health is already very weak. Only two scorpion species in the world are generally known to be able to kill a healthy adult human, neither of which occurs in North America. Cats may be more susceptible if stung, as they have less body mass so the same amount of venom will harm them more, but they also get stung less often, as they are much quicker and more observant of scorpions; in encounters between the two, cats kill scorpions much more often than the other way around.

Moved from Northern Scorpion.

This appears to be Uroctonites.