Webconcord saw temperatures at or above 90 degrees starting on july 6. July 16 marked the city’s 11th day in a row of extreme heat — two days more than the. Web(cnn) — more than 50 million people across the us are under heat alerts amid a brutal heat wave that has shattered records and caused multiple deaths across the west. Webbrentwood’s high temperature was 103, concord reached 101, morgan hill got to 96 and san jose 91. San mateo’s high was 78, oakland was 74 and san. Websee in maps how heat waves and dangerous temperatures will affect your city this summer. Track the temperatures and extreme heat wave risk in your area. Weban excessive heat watch was already issued sunday for parts of new england, including connecticut, massachusetts and new hampshire. Webdangerous levels of heat are forecast in florida, california, nevada and arizona on tuesday, according to data from the national oceanic and atmospheric.