Code says you should have 6" to 8" of concrete showing between siding and the gound level. We see lots of older houses with stucco like yours, with the stucco down to goundlevel and I'm not sure if that would be allowed today. So seeing a little concrete there dosn't bother me as much as the water showing up in the cracks by the window. There is wood around the window that needs to be protected from water. There are caulks you can use on concrete but I think you will have to waite untill it's dry. I would be giving the inside of that window a close inspection and if that been framed with treated lumber it can handle some water but if it's wet under there and non treated you may have a bigger problem.