Dozens of schools in the Northeast that don't have air conditioning are planning to close early for a second day as a heat wave continues to bake the East Coast.

Heat advisories are in effect from North Carolina to New Hampshire.

In Delaware, agencies are asking people to donate fans and air conditioners for needy residents.

Officials are again urging people to avoid strenuous outdoor activity.

The operator of New England's power grid reported high electricity demand and a tight supply yesterday. There are expectations of a slightly tighter supply today in the six-state region.