People don’t give because everything is ok. People give because there is a need. More importantly people give because there is a need NOW.
Create a real geniune sense of urgency in your appeals. Link it with a impact (ie your donation of X will do Y).
Let people know you need them to be the ones to act
Of course a word of warning, you can’t always use urgency, because your donors will see through it. It has to be genuine.