Two tropical waves crossed Costa Rica in three days, leaving nearly 500 people in emergency shelters, 862 schools closed and the Caribbean coast, the Northern Zone and Turrialba under an orange alert that still stands this afternoon. If you are in any of those areas, plan around the rain this week rather than waiting for it to pass. What gets lost in the flood footage is that the other half is having its driest stretch of the year. Guanacaste ca…