Heat wave causes deaths in Baltimore and Philadelphia . The heat already has claimed at least two lives . The heat is expected to continue through the weekend as temperatures reach 100 degrees Fahrenheit or higher across much of the country. Heat advisories are in effect until Wednesday evening in the Northeast . New York sets up cooling stations , warns not to open fire hydrants without spray caps .
Heat wave causes deaths in Baltimore and Philadelphia . The heat is expected to continue through the weekend as temperatures reach 100 degrees Fahrenheit or higher across much of the country. Heat advisories are in effect until Wednesday evening in the Northeast . New York sets up cooling stations , warns not to open fire hydrants without spray caps .