Every heat event the pipeline tracked between 2014-05-01 and 2014-09-30, with how each one grew, peaked and moved. Anomalies are against the 1991–2020 baseline.
Season at a glance
Events tracked
20
Total heat burden
70.14 Mkm²·days
Longest
26days (#9)
Hottest
+19.1°C (#3)
With a heat dome
6of 20 events
A heat dome is the stricter object: a tracked heat event with a closed 500 hPa anticyclone whose influence cap overlies it, after Loikith et al. (2026). Most heatwaves are not domes, so the label is a finding and not a synonym.
ERA5 daily maximum 2 m temperature over land, against the 1991–2020 climatology (p90 in a centred 15-day window). A heatwave cell is Tx above p90 on at least 3 consecutive days.
When the events ran
Overlapping bars are concurrent events in different places, not one event counted twice: each is a separately labelled cluster of contiguous heatwave cells.
How each event evolved
Event #9 — 2014-07-18 → 2014-08-12 26 daysheat dome · 17/26 d · Z500 +263 m
peak 1.74 M km² on 2014-08-04 · max +14.1 °C · mean +7.3 °C · burden 22.24 M km²·d · drift 1471 km (59.1 N 6.7 E → 61.3 N 33.1 E)
Event #3 — 2014-05-12 → 2014-05-27 16 dayshigh on 8/16 d only
peak 2.33 M km² on 2014-05-24 · max +19.1 °C · mean +9.9 °C · burden 17.61 M km²·d · drift 859 km (48.5 N 45.0 E → 51.7 N 34.0 E)
Event #5 — 2014-05-31 → 2014-06-09 10 daysheat dome · 7/10 d · Z500 +233 m
peak 1.65 M km² on 2014-06-05 · max +14.9 °C · mean +9.1 °C · burden 7.11 M km²·d · drift 1491 km (59.4 N 43.9 E → 46.8 N 36.0 E)
Event #6 — 2014-06-06 → 2014-06-14 9 dayshigh on 3/9 d only
peak 1.25 M km² on 2014-06-09 · max +14.3 °C · mean +8.2 °C · burden 5.61 M km²·d · drift 597 km (47.0 N 3.0 E → 41.7 N 2.2 E)
Event #8 — 2014-07-05 → 2014-07-16 12 daysheat dome · 7/12 d · Z500 +276 m
peak 647k km² on 2014-07-09 · max +15.7 °C · mean +8.1 °C · burden 3.76 M km²·d · drift 424 km (65.8 N 13.8 E → 69.2 N 18.3 E)
Event #11 — 2014-08-08 → 2014-08-19 12 dayshigh on 4/12 d only
peak 561k km² on 2014-08-15 · max +12.1 °C · mean +7.4 °C · burden 2.61 M km²·d · drift 1696 km (55.5 N 33.0 E → 42.0 N 43.9 E)
Event #16 — 2014-09-08 → 2014-09-12 5 dayshigh on 1/5 d only
peak 393k km² on 2014-09-10 · max +9.6 °C · mean +6.2 °C · burden 1.25 M km²·d · drift 341 km (62.2 N 30.9 E → 61.7 N 37.3 E)
Event #12 — 2014-08-13 → 2014-08-19 7 dayshigh on 3/7 d only
peak 400k km² on 2014-08-16 · max +8.7 °C · mean +5.0 °C · burden 1.20 M km²·d · drift 997 km (38.9 N 27.9 E → 39.2 N 39.5 E)
Event #14 — 2014-08-23 → 2014-09-03 12 dayshigh on 1/12 d only
peak 201k km² on 2014-08-27 · max +7.5 °C · mean +4.1 °C · burden 1.15 M km²·d · drift 164 km (37.8 N 41.1 E → 38.9 N 42.3 E)
Event #17 — 2014-09-10 → 2014-09-19 10 daysheat dome · 7/10 d · Z500 +269 m
peak 201k km² on 2014-09-15 · max +8.1 °C · mean +5.4 °C · burden 978k km²·d · drift 204 km (59.1 N 7.3 E → 60.2 N 10.2 E)
Event #19 — 2014-09-14 → 2014-09-24 11 dayshigh on 5/11 d only
peak 155k km² on 2014-09-20 · max +11.7 °C · mean +7.1 °C · burden 929k km²·d · drift 292 km (35.7 N 7.3 E → 36.3 N 10.5 E)
Event #1 — 2014-05-04 → 2014-05-10 7 dayshigh on 3/7 d only
peak 214k km² on 2014-05-06 · max +10.0 °C · mean +6.7 °C · burden 802k km²·d · drift 438 km (37.7 N 40.4 E → 39.5 N 44.9 E)
Event #4 — 2014-05-21 → 2014-05-26 6 dayshigh on 3/6 d only
peak 271k km² on 2014-05-23 · max +13.3 °C · mean +9.6 °C · burden 795k km²·d · drift 569 km (62.5 N 16.1 E → 57.4 N 16.3 E)
Event #13 — 2014-08-22 → 2014-08-29 8 dayshigh on 1/8 d only
peak 188k km² on 2014-08-26 · max +8.8 °C · mean +4.9 °C · burden 754k km²·d · drift 215 km (37.1 N 36.8 E → 37.3 N 34.4 E)
Event #2 — 2014-05-04 → 2014-05-14 11 daysheat dome · 9/11 d · Z500 +175 m
peak 144k km² on 2014-05-11 · max +9.8 °C · mean +7.4 °C · burden 724k km²·d · drift 405 km (38.6 N -2.2 E → 37.6 N -6.6 E)
Event #20 — 2014-09-15 → 2014-09-20 6 daysno overlying high
peak 171k km² on 2014-09-18 · max +7.8 °C · mean +5.6 °C · burden 690k km²·d · drift 200 km (52.4 N 4.0 E → 50.6 N 3.4 E)
Event #10 — 2014-07-21 → 2014-07-26 6 daysheat dome · 4/6 d · Z500 +263 m
peak 149k km² on 2014-07-24 · max +9.0 °C · mean +5.9 °C · burden 607k km²·d · drift 362 km (56.9 N -4.1 E → 53.7 N -3.0 E)
Event #15 — 2014-09-01 → 2014-09-07 7 daysno overlying high
peak 118k km² on 2014-09-02 · max +10.0 °C · mean +5.6 °C · burden 504k km²·d · drift 134 km (39.5 N -2.5 E → 38.4 N -1.7 E)
Event #7 — 2014-07-04 → 2014-07-10 7 dayshigh on 1/7 d only
peak 127k km² on 2014-07-07 · max +9.1 °C · mean +6.7 °C · burden 437k km²·d · drift 317 km (53.4 N 17.4 E → 55.6 N 20.5 E)
Event #18 — 2014-09-12 → 2014-09-15 4 daysno overlying high
peak 128k km² on 2014-09-13 · max +7.8 °C · mean +6.5 °C · burden 387k km²·d · drift 268 km (53.3 N 21.7 E → 53.7 N 17.7 E)
Filled area is the event footprint in km² (left axis); the solid line is the peak anomaly inside it and the dashed line the mean (right axis). The small panel is the centroid path, circles sized by area and the ring marking day one. Drift is the straight-line start-to-end distance, so a dome that wandered and returned reports a small number.