"As of today, 40% of shelter needs have been covered, representing just over 500,000 people. This leaves more than 700,000 in dire need of shelter with the rainy season fast approaching, and more rain in the forecast for later this week. Yet the shelter cluster's goal is to provide one tarp per family by May 1"
Read the rest here. But be forewarned, it points to a slow response. Yes I know, there may be reasons (err excuses), but the point remains these are people who are suffering and not enough is being done.
Tents are not the answer, but they are a partial answer. See ahomeinHaiti.org