* Excessive heat warning for Washington, D.C., Baltimore, and close-in suburbs | Officals warn of heat’s dangers | Heat guide *

UPDATE, 5:45 p.m.: Recapping, both Washington, D.C. (Reagan National Airport, DCA) and Dulles (IAD) had their warmest June days on record, breaking their old monthly records by two degrees.

DCA hit 104. IAD hit 102.

BWI hit 103, two shy of its record for the date of 105 in 1934, also its monthly record.

UPDATE, 2:50 p.m.: Mark Richards, weather observer at Reagan National Airport, says the temperature at 2:48 p.m. hit 104, blowing by the old June record of 102 set on June 9 in both 1874 and 2011. We are now experiencing D.C.’s hottest June temperatures in 142 years of record-keeping. There is an outside chance today’s high temperature could match D.C.’s hottest in any month: 106 reached on both August 6, 1918 and July 20, 1930.

Today is one of 10 times on record Washington, D.C. has reached 104 or higher in any month.

Dulles Airport has at least reached 100 degrees, crushing its daily record by 5 degrees (95, 1991) and (at least) tying its monthly record of 100 (from June 27, 1964). (5:05 p.m. update, Dulles has at least hit 101, breaking the monthly record)

UPDATE, 2 p.m.: The temperature at 2 p.m. climbed to 102, breaking the daily record of 101 set in 1934 and tying the all-time June record of 102 set on June 9, 1874 and 2011.

From 1 p.m.: At 12:48 p.m. ET, Reagan National airport (Washington, D.C.’s official observing station) touched 101 degrees, tying the record high for the date set in 1934. Dulles Airport has shattered its record high for the date of 95 (set in 1991), hitting 98 at 1 p.m.

These temperatures are likely to climb further this afternoon. D.C.’s all-time June monthly temperature record of 102 (set in 1874 and 2011) is likely to be matched if not broken.

See below for a video on beating the heat...