The Brief Heat wave begins today across Houston and Southeast Texas Triple-digit temperatures are possible through much of the week A few showers and thunderstorms could return this weekendSunny skies and high temperatures are in the forecast for Monday. Heat index values are climbing into the triple digits and the intense heat will possibly stay around for much of the week. Heat builds todayHigh pressure is taking control, bringing mostly sunny skies and hotter temperatures. Afternoon heat index values will climb well into the triple digits, so take frequent breaks and stay hydrated. Rain chances creep backThe heat should continue into the weekend, but increasing moisture may bring back isolated showers and thunderstorms, especially by Sunday.